Eun Pyo-eum, the leader of the failed idol group Moses, is desperate for a comeback. When a mysterious sponsorship deal offers him a lifeline, there’s just one problem: he has chronic erectile dysfunction. Seeking help from the nation's top urologist, Professor Han Girip, Pyo-eum finds that standard medicine won't cut it. To fix his condition, he agrees to participate in Girip’s new experimental therapy...a treatment that quickly turns into a series of (quite literally) shocking encounters.