Heated Shadow (2012)

Mootha, a naive twin, moves to Bangkok for work and falls for her charming but married boss, Janepope. When their affair is exposed, she is publicly humiliated and spirals into depression, ultimately taking her own life—the same day her twin sister Moonin returns home. Consumed by guilt, Moonin heads to Bangkok to seek revenge, assuming her sister’s identity to confront those who caused Mootha’s tragic fate.