After a harrowing journey into a new body, Red Blood Cell and White Blood Cell have finally met up again in this strange new world. But the circumstances of their reunion are dire: They've just discovered that this new body has diabetes. The kidney cells grew overtaxed by having to filter too much sugar, and a terrible fate has befallen the islets of Langerhans in the pancreas... A new code black brings a slew of new complications: sleep apnea, pancreatitis, gum disease–how can any cell keep working under these conditions?!