Five-Headed Shark Attack is a 2017 Canadian Horror-Comedy film and sequel to Four-Headed Shark. It stars Michael Cera, Mila Kunis, Morgan Freeman, Steven Bauer, Adam Driver, Christopher Mintz-Plasse, Jack Black, and Jonah Hill. It's sequel is called Six-Headed Shark Attack.
A 17-year-old witnessed a murder by a crime lord but is protected by the C.I.A. and is hired by them to go to L.A. by a boat to charge the criminal. However, the crime lord finds a dangerous shark with five heads and fills the ocean with it to kill the witness or take the whole boat crew down with him.
17-year-old Cody (Michael Cera) is having a summer vacation in Hawaii but sees a prosecuter (John Schneider) hanged upside down and tortured. He tries to save him but they see cars coming and he tells Cody to hide. Cody sees the criminals and finds out their led by Fernando Jaramillo (Steven Bauer). Jaramillo torments him about his son going to grow up without a father but Jaramillo has no problem hurting kids. He beats him to death with a baseball bat as Cody watches in horror, much to the gang's excitement. They cheer for their boss and he tells them to clean this up because he's going to L.A. Cody tries to escape quietly but accidentally kicks a soda can, causing them to hear it and see him. He manages to get out of there and they hear a train coming so they get out of there and are planning on finding Cody.
At Cody's hotel room, he watches the news about Jaramillo to learn about him but finds out the cops are corrupt and can't help him. When he hears a noise at the door, he finds out they found him by tracing the license plate number. However, he is saved by C.I.A. agent Chef Hatchet (Morgan Freeman) and he says, Come with me if you want to live. Chef shoots them and they escape in Chef's car.
At C.I.A. headquarters, C.I.A. director Chris McClean (Jack Black) gives them an assignment to go to L.A. on a boat and charge Jaramillo with manslaughter and other various crimes.
At the docks, they befriend Trent (Christopher Mintz-Plasse), Owen (Jonah Hill), Justin (Channing Tatum), and Gwen (Mila Kunis), who Cody falls in love with. But they get annoyed by arrogant and selfish jock Alejandro (Adam Driver), who hates being called Al. Alejandro brought his girl-friend Heather (Erica Durance) and their friends, bad boy Duncan (Kris Lemche) and his selfish, abusive, annoying, and bossy girl-friend Courtney (Alexz Johnson). They also meet fellow teenagers Geoff (Ryan Merriman), his best-friend D.J. (Texas Battle), Geoff's girl-friend Bridgette (Julianna Guill), Noah (Aaron Yoo), and Ezekiel (Ben Feldman). There's also Harold (Clark Duke), his girl-friend Lashawna (Malika Haqq), funny jock Tyler (James Franco), and his silly girl-friend Lindsay (Anna Faris).
At Jaramillo's hideout, he found a five headed shark and filled the ocean with it after finding out where Cody is.
On the boat, Cody hangs out with Gwen and tells her that he is charging Jaramillo for crimes that Jaramillo committed. But they get annoyed by Alejandro's lady talk. Ezekiel tries to talk to the girls but has sexual comments that upset them. They all mess around instead of doing home-work. But their ship hits something and they go to a island until it's fixed.
On the island, they see a dead whale and Bridgette wonders what happened. Alejandro responds by saying, Something ate it, stupid. Geoff goes to check it out and sees shark bite marks. Bridgette goes to the boat to help out. Chef has a phone conversation with Chris.
At the boat, Heather is forced to fix it. But before she finishes, the five-headed shark appears and kills her. Bridgette is unaware of that.
On the island, Duncan and Courtney waste time and make out in the water. When the shark appears, it bites Courtney and she spits out blood. She collapses in the water and gets eaten alive. Duncan tries to everyone but also gets eaten alive by the shark. When Cody goes to relax, he sees Duncan and Courtney's blood in the water. He goes and warns everyone. They all see Alejandro goofing off in a speeder boat along with D.J., Tyler, and Lindsay. But the encounter the shark. Noah and Ezekiel go to save them but are eaten alive by the shark. It attacks D.J. and kills him, Geoff says, NO! Alejandro betrays Tyler and Lindsay by leaving them to get killed by the shark. Alejandro is beaten up by Gwen for his actions but he gets depressed to find out that Heather was also killed.
At the C.I.A. headquarters, Chef tells Chris, Jaramillo somehow managed to fill the ocean with a dangerous five headed shark. Chris believes and every unit to save any survivors. He also orders them to bring in Jaramillo and charge him with multiple counts of murder and attempted murder, even sentencing the crime lord to death.
However, Jaramillo fill into toxic waste and became half-human, half-shark a.k.a. Man-Shark. Later, Gwen forces Alejandro to help her with the boat.
At the boat, Gwen manages to fix it and calls for any help. But Alejandro abandons her and tries to escape by himself. However, his phone starts ringing and the shark attacks him, even ripping him into parts and eating him alive. Gwen escapes the boat as it's sadly destroyed by the shark.
On the island, Chef makes a speech to make them brave but is attacked and killed by the shark, his body is later seen being torn apart. Cody tells them that Chef's right and confesses this because he is tasked by C.I.A. to charge Jaramillo for murder, attempted murder, and police corruption. But they don't blame him and decide they have to work together if they want to get rid of that shark. They recognizes the Man-Shark as Jaramillo but they set up a plan to kill him and teach him a lesson about killing. They realize the island is somehow beginning to have a earthquake and it's sinking.
All of them split up, Geoff and Bridgette stay and share one last kiss before getting killed by the shark. Harold and Leshawna stop at a dock and think their safe but get eaten alive by the shark. Cody, Gwen, Trent, Owen, and Justin find an explosive barrel and use it to as their way of killing the shark. Owen and Justin see the shark and fight it but are devoured by it. Cody, Gwen, and Trent hear this and realize they're the only ones left. Trent decides to get killed so they can escape and they give a goodbye hug. He fights the shark and gets killed but manages to put the barrel in it's mouth before dying. Cody and Gwen escape and reach a giant rock. Cody finds a rifle and starts shooting the shark. He then aims for the barrel and says, Smile you son of a... He then shoots the barrel and it blows up. The shark and Jaramillo are killed, ending Jaramillo's killing spree.
Helicopters arrive to save the survivors. They share a kiss and get ready for a happy ending.
- Michael Cera as Cody - The Main Protagonist of the film. His goal is to help the C.I.A. stop Jaramillo (succeeded) and to kill the shark (succeeded).
- Mila Kunis as Gwen - The Female Protagonist of the film and Cody's love-interest.
- Morgan Freeman as Chef Hatchet - The False Protagonist of the film and C.I.A. agent from Hawaii.
- Steven Bauer as Fernando Jaramillo - The Main Antagonist of the film and C.I.A.'s most wanted crime lord.
- Adam Driver as Alejandro - The Tertiary Antagonist of the film and Cody's rival. He doesn't care about his friends and is a 18-year-old jock who's arrogant and selfish.
- Christopher Mintz-Plasse as Trent - The Secondary Protagonist of the film and Cody's best-friend.