The action thriller film follows Lee Doo-seok (Park Si-hoo), a fictionalized representation of Choon-jae, who publishes a tell-all book confessing to his crimes from 15 years earlier, which have fallen outside the statute of limitations. The South Korean crime movie succeeds in its well-staged action sequences and a quick succession of problems and solutions, supported by remarkable stunt work, culminating in a thrilling serial killer story with surprising twists. While it is no Oldboy, Unstoppable makes for a gripping South Korean crime film, joining the ranks of popular assassin films like Kill Boksoon or revenge flicks like Lady Vengeance.