Ob-oom tasks her twin Ai-oon to break up her affair with May right before the accident that leaves her comma occurs, but Ai-oon senses something suspicious from May who turns out to be blind.
Jan, Ob-oom's best friend, tries to discover the truth behind the accident that happened to Ob-oom and her husband. Meanwhile, Ai-oon begins to get caught up in her attraction toward May.
Ai-oon realizes how small her position is in her grandmother's heart compared to her twin, as she also has to face complicated feelings between falling in love with May and realizing that May's love isn't for her, but for Ob-oom.
