 Ma Shan is woken by his angry wife and as he dresses for work, he realizes he has lost his gun. As a police officer in small town China, this is a very serious offense. He frantically begins searching for it by retracing his steps. He d gotten drunk the night before at a wedding and must have "lost" it there. He tracks down numerous guests, but can t find his gun. Then his ex-girlfriend winds up dead, killed with his gun. Can he find it before more people are killed?