After an attempted assassination on Ambassador Han, Inspector Lee and Detective Carter are back in action as they head to Paris to protect a French woman with knowledge of the Triads' secret leaders. Lee also holds secret meetings with a United Nations authority, but his personal struggles with a Chinese criminal mastermind named Kenji, which reveals that it's Lee's long-lost...brother.
Kai—an outcast—joins Oishi, the leader of 47 outcast samurai. Together they seek vengeance upon the treacherous overlord who killed their master and banished their kind. To restore honour to their homeland, the warriors embark upon a quest that challenges them with a series of trials that would destroy ordinary warriors.
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.