Early one morning in a Southeast Asian tourist destination, dismissed police officer Paisa approaches a Japanese tour bus—but it drives away.Parked in front of him is another bus, carrying a group of Hong Kong tourists. Among them, Elaine chats with her boyfriend Wang Jinming, holding a souvenir she plans to bring back to her son.A brief delay keeps the bus from leaving on time.Moments later, Paisa—this time armed—steps onboard.Nothing will be the same again.