South Korea (2014), by Seoung-hoon Kim
On the way back from his mother's funeral, special crimes detective Gun-su gets into an accident, killing a man instantly. The accident may ruin his life and career. In order to cover up his crime, he hides the body inside his mother's coffin. 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 to threaten his life and make Gun-su pay for the crime.