"Izu- Izumi....," she stuttered, crying. "What about her?" "She just... She just.... left." she sobbed, "she said she wouldn't... wouldn't go out tonight. But now... she's... gone," When the girl group, Bluesky gets moved to JYP Ent from HYBE for some unknown reason, things take an unexpected turn for them. Jiyoung (MC) finds an innocent true love, while Lee Know, her brother reveals something. A life-changing secret.