Nicholas Moore suspects his fiancé Mona is cheating on him. He's discovered intimate text messages on her phone from a man called Sio Bohan. Determined to get proof of his suspicion he hires taxi driver Trevor to follow her so he can catch her in the act. Trevor's short temper results in a road rage incident sending them off the road and off Mona's tail. With Nicholas desperate to find the truth and Trevor keen to make as much money as possible, they work together using terrible detective skills to try and make their way back to Mona. The problem with their plan is that Mona is not with some guy but with her female friend Siobhan. Nicholas and Trevor end up on a wild goose chase across Sydney. Through a series of wrong turns and bad decisions, our heroes discover there is in fact a man called Sio Bohan, who just happens to be the deadliest gangster in the city. Convinced that he is sleeping with Mona, Nicholas and Trevor risk their lives to track him ...