In fact, I am a killer

England, 2023. Famous writer Tony Davis lives in luxury and abundance. But he doesn't have long to live – fifty years ago, his murder was ordered. Before his eyes. And now Tony is waiting for the sentence to be carried... out…
 
England, 1973. In a night train carriage from London to Newcastle, there are only four people. To pass the time, they decide to play a game – guess what each one does for a living. Unassuming Mr. Brown confesses to his fellow travelers that he is a hired killer. It seems like a bad joke. Hired killers don't exist, right? But soon after the train arrives in Newcastle, the body of one of the travelers is found…
 
Constable Aline James, dreaming of climbing the career ladder despite the distrust from the management, decides to conduct the investigation on her own. She doesn't even suspect how dearly she will have to pay…