Second Sister (2025)

Plot

High schooler Ji-eun became the target of vicious online rumors, twisting her from victim into villain until she couldn't take it anymore. Her grieving sister So-eun turns to detective Jun-kyung, desperate for answers about what really happened. As he digs through the digital trail, one anonymous account leads to another, and the simple story of a cruel rumor unravels into something far darker—a tangled conspiracy hiding behind screens and fake names.