Not to be confused with a similarly titled Japanese film, Memoir of a Murderer is an intense mindbender of a thriller. Like a cross between Memento (2000) and Seven (1995), the film follows a serial killer with Alzheimer’s, who starts to question his memory when a series of killings occur in the small town he lives in. The non-linear narrative helps recreate the sense of disorientation and confusion the lead experiences, racketing up the suspense, and pushing the audience to keep guessing each time the film goes through each of its twists and turns. This unique storytelling was why it’s one of the many films that popularized South Korean thrillers, becoming the first film in the country to get two million tickets sold.