Henry, a dedicated antibody, goes from assignment to assignment within human bodies and tries his best to save lives. Hypersensitive individuals don't make it sometimes, though. Henry is tormented by a casualty of the past, Marin, a teenager he liked. She got stung by a bee and died. A war between antigens and antibodies took place within Marin's body and Henry was there trying to persuade antibodies to quit overreacting before it was too late. But they didn't listen. When another hypersensitive young woman is about to lose her life, Henry knows it's up to him to prevent the tragedy. "My story is about saving lives before it's too late and increasing awareness regarding allergies, asthma, and autoimmune afflictions. I'll do my best," says Henry.