Marvin Gable (Kwan Chi-wai) is a real estate agent working in a suburb of Milwaukee, where there are "Houses for Sale" signs everywhere. One day, Marvin Gable suddenly receives a scarlet envelope from Rose (Ariana DeBose), his former partner who was abandoned for dead, so she is extremely upset with him. Now, Marvin is forced to return to a world of ruthless killers, full of double betrayals, and even open houses become deadly battlefields. When his hot-tempered crime syndicate boss brother "Knuckles" (Daniel Wu) sends his men to hunt him down, Marvin must face the choices that have always haunted him and the past he never really escaped.