After a fast turn on the night road, cabbie Wu Tao (Eric Tsang) drives right into the Yangtze River and apparently drowns, though his body is nowhere to be found. His passenger, club hostess Su Dan (Karen Mok), is left with a severely fractured leg. Unable to pay mounting hospital bills but determined to take responsibility, Wu Tao's wife Li (Jiang Wenli) decides to take in Su Dan, and care for her during recuperation. Though Li's angsty teenaged son Xiao Chuan (Tan Jianci) is initially less than thrilled with the loud and demanding guest, some odd semblance of normalcy settles while relationships change; Li befriends a younger man (Eason Chan), and Xiao Chuan falls for the older Su Dan. But as the days pass in that hot and cramped flat, the ambiguous connections and unspoken tensions among the increasingly infatuated Xiao Chuan and the mutually weary Su Dan and Li begin to drive lives in unexpected directions, and hearts to unanswered questions.