The blood in the bowl began to churn. The "Blood Pledge" wasn't a pact of friendship; it was a . The school didn't care about their grades—it cared about the debt.
Un-joo's younger sister, Jeong-eon, witnesses the fall and begins a relentless search for the truth, pestering the surviving trio.
, begins investigating the death, suspecting it wasn't a simple suicide. As she digs deeper, dark secrets involving teen pregnancy, academic competition, and intense jealousy between the friends are revealed. Core Themes & Content Suicide Pacts
The film centers on four high school friends— (Jang Kyeong-ah), So-hee (Son Eun-seo), Yoo-jin (Oh Yeon-seo), and Eun-young (Song Chae-yoon)—who make a grim suicide pact, signing it with their own blood. They agree that if they fail to die together, those who survive will be haunted for life.