Contains spoilers for this episode and earlier episodes.
A quiet stretch between jobs turns dangerous when Jet is bitten by something in the Bebop's dark storage spaces. Earlier, he has lost his clothes to Faye in a rigged dice game, leaving their usual arguments over money and responsibility running alongside the new alarm. Spike initially has no clear explanation for the swelling left by the bite, and the creature remains hidden in the ship. Faye dismisses Jet's distress until it attacks her in the bathroom. Ein is bitten too, and Ed disappears from Spike's sight, making the familiar corridors seem less safe with each unsuccessful search.
Spike equips himself to hunt the moving patch of slime, using improvised goggles and enough weapons for a much larger enemy. Guns and fire fail to solve the problem. His search leads him back to a refrigerator he had forgotten, where he once hid a Ganymede rock lobster so nobody else would eat it. The neglected food has become a foul growth, and Spike decides to eject the refrigerator through the airlock. The creature bites him before he completes the job, leaving the incapacitated crew floating as the ruined contents spill into space. Ed, who was asleep rather than bitten, encounters the remaining organism and eats it as if it were a snack. The ship's emergency ends with Spike's forgotten meal exposed as its source.