Early one morning in a Southeast Asian tourist destination, disgruntled former police officer Paisa walked toward a Japanese tour group's bus, but the bus drove away. A Hong Kong tour bus was parked in front of Paisa. Elaine, a member of the Hong Kong group in the car, looked at the souvenir ornament in her hand and talked with her boyfriend Wang Jinming, giving it to her son from her ex-husband after returning to Hong Kong. Because a member of the tour group had diarrhea, the bus left a little late, but Paisa with a gun boarded it.