Working a part-time job, living without relying on his adoptive parents, getting paid by his flatmate to do his work for him—such is the daily life of Al Adley, a rather dry South Asian man in his 20s. His self-reliant and simple lifestyle changes on the day he realizes that a single event can change one's whole life: that day is when news breaks out that the mayor of London has been fatally stabbed while on a train through the Tube. Al just happened to be at the scene of the crime, and suspicions that he may be the culprit only grow when he finds a bloody knife in his jacket pocket later that evening.

It is not long before Al gets a knock on his door from Lenny Ellis, an inspector for the police who is overly dedicated to his job. With the detective willing to give the young man the benefit of the doubt, Al and Ellis begin a race against time to find the mayor's true murderer.