A group of 20 somethings want to end the summer on a high, they take the advice from a girl they met at a festival about a secret rave deep in the Valleys. When their route is detoured, they have no choice but to venture into the unknown. Once they come across a derelict aqua park, they soon realize what they thought was their salvation turns out to be the heart of the Cannibals lair.

Inspired by the 1982 Roberto Calvi Affair in which an Italian banker was found hanging from a bridge across the River Thames, the story follows Alan, a man from Northern England who is homeless after the loss of his wife and job. One night while sleeping in a deserted building, Alan witnesses the murder of a high-profile businessman. He attempts to leave the scene unnoticed, but the killers realize that someone has seen them commit the crime. He goes to the police only to discover that one of the killers is leading the case. To stay alive, Alan recruits the help of Billie Hayman, an American journalist, to cover his story.

A young, rising star and a seasoned veteran share their stories as Thailand's most historic and famous Muay Thai stadium is replaced with a new and modern facility.