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

Nicolas is going through a difficult phase after his parents’ divorce. He’s listless, skipping school, lying and thinks that moving in with his father and his new family may help. A fresh start. When he doesn’t settle there either, he decides that going back to his mother’s may be the answer. When change feels like the only way to survive, what will he do when the options begin to run out?

A British intelligence officer Kate Henderson races against time to uncover a UK politician's potential ties with the Kremlin, risking her reputation and family, as a murder and election loom.