The film's narrative centers on a complex tale of infidelity, murder, and social dynamics within heterosexual relationships. There are no identifiable LGBTQ+ characters or themes depicted throughout the story, focusing instead on the consequences of a man's double life.

The film 'Mystery, 2012' is a crime drama centered on a man's discovery of his wife's secret second family and a subsequent murder investigation. Extensive plot summaries and character descriptions do not indicate the presence of any transsexual characters or themes. The narrative focuses on infidelity, obsession, and the dark side of human nature.

The movie does not contain any action or adventure elements.

The film "Mystery" (2012) is an original story, not an adaptation of existing source material or a reboot of established characters. All characters were created specifically for this film, precluding any instance of a gender swap from prior canon.

The film is a Chinese production based on a contemporary Chinese novel, featuring characters who are consistently portrayed by actors of East Asian descent. There is no prior canon or historical record establishing any character as a different race than depicted on screen.

Not depicted in the film.