Five Nights at Freddy's 4 is a game in the Five Nights at Freddy's Series. It takes place in the location of the first game. It features the same animatronics (excluding Golden Freddy) with different behavior and there are different phone calls.
Phone Guy gets a partner. The partner and Phone Guy must survive 5 (7, but only the partner stays for night 6 and night 7) Nights at the pizzeria. At the end of the game, the partner is fired for kidnapping Phone Guy (which explains why he doesn't appear in nights 6 and night 7) and Phone Guy works alone once again.