Directed by Gary Mak Wing Lun, whose filmography as an assistant-director is much more illustrious than his filmography as a director, Inside or Outside follows a pair of private detectives: Fei Xin (Simon Yam) is a cool, collected retired police sergeant and Qiu Le (Wallace Huo) is a hothead who got expelled from the police. One day, successful writer Nanfang (Rayza) calls on their services to follow her husband Ou Jian (Jang Hyuk), whom she suspects of having an affair. She’s just given birth, and Ou’s coldness to her and the baby makes her think he doesn’t love her and married her for her father’s money and business connections. It turns out Ou is infertile but hasn’t told his wife, and thus believes she cheated on him and the baby is from another man. To complicate matters, a man from his past resurfaces: Xie Tianyou, his former business partner, against whom he testified in a trial and who subsequently went to jail. Xie is actually a dead-ringer for Qiu Le (and thus also played by Wallace Huo), which complicates matters even furtherer.
