The story begins with Yanny (Charlene Choi) going to the United States to visit her long-lost girlfriend Ling (Sammi Cheng) in order to escape from her failed relationship in Hong Kong. Ling and her husband Tang (Tong Dawei) seem to be living a peaceful and ideal life in San Jose. But in just five days of visiting, Yanny actually uncovered the truth behind the couple's identities. The three people each have their own unspeakable history, and they are replaying the trajectory of a murder, rushing towards a life-and-death ending. The American dream of a stranger, loneliness and suspicion accumulate to a heavy price.