Ren and Yu find their passion in dance, dedicating themselves to daily practice for an upcoming competition next week. However, one day, Yu suddenly collapses during rehearsal. Witnessing this, Ren notices needle marks on Yu's arm and is horrified. Driven by the desire to protect her best friend, Ren investigates the truth behind the drugs. She infiltrates a yakuza office to gather information, but instead ends up being demanded to pay off her friend's drug debt. A tense and gripping story unfolds.