The story is set in 1947, following a long-retired Holmes living in a Sussex village with his housekeeper and rising detective son. But then he finds himself haunted by an unsolved 50-year old case. Holmes’ memory isn’t what it used to be, so he only remembers fragments of the case: a confrontation with an angry husband, a secret bond with his beautiful but unstable wife.

Sam & Fordy run a credit card fraud scheme, but when they steal from the wrong man, they find themselves threatened by sadistic gangster. They need to raise £5m and pull off a daring diamond heist to clear their debt.