Mark Wu directed the action comedy film Undercover Duet in 2015. The film was released in Hong Kong on August 27 and in China on October 23, 2015. It was a Hong Kong-China co-production.
Dream Dragon, an undercover officer, is assigned to a special mission: to defend his old pal, flaunty James, during a male beauty competition. The police utilize the opportunity to bait the killer because James is the only witness in a suspected replacement case involving the son of the richest developer. However, the incompatibility of Dragon and James makes the operation more difficult.