The Shameless

A petty cop, Jung, gets caught in the middle of a love triangle between mob enforcer Park, mob boss Lee, and Lee’s mistress, Hye Kyung, who’s in love with Park. Lee promises Jung a fat reward if he hurts Park. He agrees and stakes the man out through Hye Kyung’s house. A botched arrest sends Park on the run, but Jung decides the best way to find him again is by sticking with Hye Kyung. Threatening his way into a job at the nightclub she works at, they become friends and he wins her trust. When Park returns asking for money,
Hye Kyung spends an intimate night with Jung and makes him promise to find some money for Park. However, with newly found emotions for each other accelerating Jung’s toxic jealousy, their relationship becomes entrenched in a turmoil that ends with a fatal confrontation. (Source: KoBiz)