"Diving Diva" Lee-young is talented, beautiful, and has a strong personality. Only not being able to be with her best friend Su-jin stands in her way. Just so she can help Su-jin, she changes her event to synchronized swimming. Su-jin and Lee-young are putting everything they have into Olympic selection practice when they get into a freak accident. Su-jin vanishes without a trace, while Lee-young stays alive but loses her memory. Lee-memories young's slowly come back to her, but she remembers that Su-jin had a strange side. On the diving board, her iron will begins to shake.