In a downtown apartment with bizarre, unspoken rules, a five-member idol group called "Snowdrop" lives together. Each girl hides a secret she can never reveal to the outside world.
One day, the members receive an anonymous threat letter exposing their pasts. While their manager, Shima, uses ruthless and decisive methods to tackle each crisis, group member Himari begins to uncover a shocking truth hidden beneath the surface. As she digs deeper, she finds herself drawn into a chain of events far darker and more unpredictable than she could have ever imagined…
