"Lost in Hong Kong" is a 2015 Chinese romantic comedy film directed by Derek Tsang. The story follows a young couple, Kwan and Cheng, who embark on a journey through the vibrant streets of Hong Kong after a series of misunderstandings and misadventures. The film explores themes of love, friendship, and the challenges of modern relationships. As the characters navigate the bustling city, they encounter various quirky individuals and situations that ultimately lead them to discover more about themselves and each other.