This is the human body. A world where many cells work hard. One day, white blood cells (neutrophils) and red blood cells met ordinary cells that took in lost lactic acid bacteria. In order to escort the lactic acid bacteria to their companions, white blood cells (neutrophils) and ordinary cells set out for the intestines. However, they met the strongest enemy who came with bad intentions. "Who is the righteous side between you and me? Let's take this opportunity to find out clearly." Cancer cells reappeared. And the intestinal environment destroyed by bad bacteria. The body is facing an unprecedented crisis! ? "Give up, cancer cells!" In order to protect this world, white blood cells (neutrophils) challenged the battle that gambled the fate of the world.