Self-described teen psychopath James (Alex Lawther) and his rebellious classmate Alyssa (Jessica Barden) take off on an impromptu cross-country trip to escape their dull lives and to find Alyssa's dad in THE END OF THE F***ING WORLD. While the novelty of their adventure quickly wears off, the duo determines to see it through, taking drastic and often illegal steps to keep on the move. As Alyssa reflects on events of her past that brought her to this point, James' focus remains on the future and his secret plan for Alyssa's eventual murder.