In Fung Chih Chiang’s A Witness out of the Blue, Louis Koo (now in his sixth film released this year) plays Sean Wong, a career criminal on the run after a jewellery store robbery that left several people dead. Inspector Yip (Philip Keung), whose undercover agent was killed on that day, is especially dogged in his pursuit of Wong, but the case becomes more complicated when the latter’s accomplices start being killed one by one. The only witness of the first murder is a parrot, a clever animal which inspector Lam (Louis Cheung) believes can help him find the killer. Quickly, it becomes doubtful that Wong is the one killing his accomplices; instead, suspicion falls on some of the customers present on the day of the robbery, whose life was forever altered by it: a butcher whose mother died on that day (Patrick Tam), and a security guard (Andy On) whose girlfriend (Fiona Sit) was crippled. But Lam also suspects Yip himself, believing his thirst for vengeance to have gotten the better of him.

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