One victim, found dead on a London street. Four detectives, in four different time periods, must solve the mystery to protect Britain’s future.

A year after a subglacial volcano erupts, mysterious elements from prehistoric times emerge from the melting ice, bringing unforeseen consequences.

In a mysterious shop that sells lamps, the dead may return to the world of the living, while the living may not walk out alive.

Dark secrets are revealed after a tragic event at an elite boarding school sets off a search for the truth.

January 1943: Admiral Karl Dönitz, head of the Nazis’ U-boat fleet, has brought Britain to the brink of starvation by ruthlessly destroying close to a thousand of their merchant ships….