Naive T Cell is patrolling the body for influenza virus proliferation. But since he's never taken on the enemy before, he's completely terrified and useless. He finally ends up fleeing the battlefield, where the veteran Killer T Cells, Neutrophils and Macrophages are battling. Naive T Cell is filled with self-loathing until Dendritic Cell sees him and speaks to him kindly. This encouragement transforms him into Effector T Cell, a much braver and stronger form that joins the other immune cells in wiping out the influenza virus. However, a surviving virus mutates into Type A and proliferates again, so the fighting goes on.