Sister

Hae-ran, an undocumented immigrant, turns to loan sharks to pay for her sick sister's surgery, leading her into a downward spiral. In desperation, she kidnaps So-jin, the daughter of the company's owner, with the help of her accomplice, Tae-su, who is also a loan shark. Their meticulously planned abduction initially succeeds. However, during Tae-su's absence, So-jin overpowers Hae-ran and seizes her gun. In a moment of panic, Hae-ran reveals a secret known only to her. Caught between Tae-su and So-jin, Hae-ran grapples with the dilemma of securing her sister's surgery funds while ensuring So-jin's safety. Amidst this turmoil, an unexpected truth comes to light.