Xu Lai, a middle-aged man facing a midlife crisis, once aspired to be an artist but now works as a bra designer. He feels trapped in his mundane life and is haunted by thoughts of what could have been, especially his lost love, Yang Yi. During a family trip to Hong Kong with his wife, Cai Bo, and her goofy younger brother, Lala, Xu Lai seizes the opportunity to secretly meet Yang Yi at her art exhibition. Lala, an aspiring documentarian, constantly films Xu Lai's every move, leading to a series of humorous and chaotic events.

As Xu Lai navigates through Hong Kong's bustling streets and landmarks, his attempts to reunite with Yang Yi become increasingly complicated and farcical. Throughout their misadventures, Xu Lai and Lala encounter quirky characters, uncover secrets, and face numerous obstacles. The journey forces Xu Lai to confront his past choices and re-evaluate his present life. Ultimately, the experience becomes a revelation about love, identity, and the importance of family.