Henry "Hiccup" Haddock begins his first day on his last year in Berk High School. Finally joining a group of friends and becoming friends with the girl of his dreams... he couldn't been more happy. But what he didn't expect was that on the very same day, everything will turn into chaos and making him and his new friends fight for their own lives from... zombies.

Gideon's insane cousin is BIG trouble for Dipper and Mabel, especially when she agrees to break Gideon out of jail and help him with his newest plan to destroy the Pines family! After a fight with her, Dipper is sent to hospital, meaning there is no one to protect Mabel (and her sanity) from the demonic Gleeful duo and their plan to obtain power and avenge the Gleeful family name!

Based on the second episode, Dipper pushes Mabel out of the way of a falling tree. He is now trapped under it. A storm forces them to leave him there overnight. Will he be alive when they return?