On the way back from his mother's funeral, special crimes detective Gun-su gets into an accident, killing a man instantly. In order to cover up his crime, he hides the body inside his mother's coffin, with her inside. A few days later, Gun-su's crime pops up on the police database and his partner is heading up the case. Gun-su feels distressed as his partner slowly uncovers more details of the accident. To make things worse, a witness to the accident approaches Gun-su by threatening his life.
Take a look at the trailer below.