It's been six years since Mariano graduated from film school. He's about to turn 30 and he still lives with his mom, spends most of his time watching movies and has never written a single screenplay. His comfortable routine changes when his 15-year-old cousin, Ramiro, moves in with them.

King, a trafficked lion cub, escapes from the airport and takes refuge with Inès and Alex, who then have the crazy idea of getting him back to Africa. Anything can happen when Max their kooky grandfather, decides to join the adventure.

When a zombie virus pushes Korea into a state of emergency, those trapped on an express train to Busan must fight for their own survival.