Gravity Falls Season 3 Episode 1 - The Mermaid

Plot
After the Weirdmaggeddon, Stan and Ford move out to sail in the deep seas. Suddenly, they were having a conversation in their boat, The Stan O War, that they sinked into the bottom of the ocean and found mermaids. Ford copied everything he found about them in Journal 4, a new journal he had been working on. Though Stan was not interested in anything, Ford was surely delighted after writing information about the "dream-come-true" creatures. Meanwhile, the Mystery Shack was having the 31st anniversary that just came in Soos' non existent mind. But Gideon was sure to ruin it with his henchmen in the look-out. Suddenly, a letter came to Soos from Stan who was bored and has written letter to sent help. Soos took it seriously as Gideon got confirmed by his men and decided to stop Soos and let the Pines brothers out of his way forever. As usually, Soos failed and lost his pride. But soon, it was enlightened by a photo of him and Stan and the Pines twins standing near the Shack. Meanwhile, Ford has got out of his learning and wants to get out but Poseidon won't let him. Can Stan save him?