Ding Hui is a member of Purple Butterfly, a powerful resistance group in Japanese occupied Shanghai. An unexpected encounter reunites her with Itami, an ex-lover and officer with a secret police unit tasked with dismantling Purple Butterfly.

An obsessive-compulsive Japanese librarian living in Bangkok spends most of his days contemplating suicide in his apartment. His life changes when he witnesses the death of a young girl and becomes acquainted with her elder sister.