At school, a student named Yeon-Woo leaves early claiming he's unwell after getting drenched, raising concern among peers who question his toughness. Meanwhile, a girl notices the school lockers are too small and asks someone to hold her belongings. She recalls that the Makgangpa Clan members all wear a key-shaped pendant and sees this as a rare chance to find one. Tension builds when she discovers a torn family photo, hinting at hidden troubles, just as someone interrupts her, leaving the mystery unresolved.