Everything starts with a fall. A man who was climbing a mountain is found dead, crashed on the ground. Tragedy? Suicide? Homicide? Handsome detective Hae-jun (Park Hae-il) investigates the mystery. He is a gentle man, happily married and devoted to his work, the youngest inspector in Busan, a city of unsolved cases where crime rides high.

Making the case even smokier is Seo-rae (Tang Wei), the elusive, charismatic, and impossibly attractive Chinese wife of the deceased, whose charm creeps under Hae-jun’s skin. In ways he could have never envisioned, their broken conversations – deciphered through smartphone translations, her composed gestures, and mysterious allure – upset his life little by little, making him fall mentally and emotionally.

Wei’s performance intrigues and captivates, her black-widow role seemingly tailored to her magnetic personality, shining in the splendid work of indisputable Korean master Park.