The body gets a stomach ulcer, so the red blood cells are called to supply oxygen and nutrients so it can be repaired. When a few red blood cells are killed by splashes of stomach acid, AC1677 runs away in fear, but eventually comes back. The ulcer is revealed to be caused by H. Pylori, so U-1196 and the other Neutrophils battle it. The battle causes tremors and AA2153's leg is injured by a splash of stomach acid. AC1677 pulls him to safety, but falls into the stomach acid himself and dies...