Each and every body is a legion of cells, all performing their function to keep their owner operating.

The world is a dangerous place for a red blood cell just trying to get her deliveries finished. Fortunately, she's not alone... she's got a whole human body's worth of cells ready to help out. The mysterious white blood cell, the buff and brash killer T cell, the nerdy neuron, even the cute little platelets, everyone's got to come together if they want to keep you healthy.