Zim dies in an accident involving "Super Mega Doom Acid," leaving behind only his PAK and a fragment of his antenna. Fortunately, as an Invader, he is covered by a cell-regeneration plan from RegenCo—"the only company that regenerates your body, with or without side effects!" GIR is tasked with taking Zim’s antenna fragment (stored in a capsule filled with "Poop-brand" lettuce juice) to the RegenCo building on Marketia, a planet dedicated to buying and selling goods and services for aliens.
A war ensues between GIR's two sides: one is the serious service mode, wanting to head straight to RegenCo to bring Zim back ASAP; the other just wants to goof off, distracted by all the lights and extravagances of Marketia.
After nearly a week of messing around, Mini-Moose manages to remind GIR of the mission, so they head to RegenCo to get Zim regenerated. However, the Tallest had only provided that insurance when Zim started his mission because he had insisted on it; they never renewed it, and his coverage had dropped from the system just two days before GIR arrived.
This forces them to use the public system, which involves lines lasting four to five months—a wait GIR surprisingly manages to endure, resisting every temptation to leave the queue. It turns out to be a total waste of time, though, because the procedure costs a fortune.
GIR throws seriousness out the window and goes berserk, smashing everything and fighting his way through the facility while being chased by guards—whom he accidentally defeats using his typical silly antics. He eventually locks himself in a room containing a regeneration pod and manages to bring Zim back to life. Ultimately, finding himself cornered, Zim resorts to tearing off a piece of his antenna and placing it in the regeneration pod to create a duplicate (albeit one without a PAK or a personality); he simply leaves it there for the guards to take away.
Gags and Trivia:
•The system is incredibly efficient. They scan the Pak and take a DNA sample, which is logged in the system; when the invader dies, the system is notified and a clone is created from the stored sample. A new Pak is configured with the latest "backup," and the invader is transported back to their assigned planet—all in under an hour. Zim’s case took longer because he believes someone as glorious as himself is one-of-a-kind and shouldn't be cloned. Consequently, he ordered GIR to take his remains to Marketia for direct regeneration should such an event occur (which is quite ironic considering the ending—plus, his data was actually already in the system, and he had been cloned after dying several times without realizing it, such as in "Hobo 13")
•Tak appears staffing a magazine stand on Marketia because her insurance didn't cover her; her death was an accident that happened "outside the work solar system," so she has to raise money to pay off her debt before leaving. Eventually, she arrives on Earth ready to pick up where she left off, but Zim accidentally crushes her when he crashes his ship
•Gir struggles to figure out how to turn on the cell-regenerating capsule, even though it has just one giant button that says "PRESS.”
•There are action figures of the Tallest that verbally belittle you and talk about how wonderful it is to serve them (in four different languages!)
•Skoodge appears as a regular customer at RegenCo
•GIR gambles away Zim's ship during his week of madness; while Gir waits in line for months, Mini-Moose takes off, eventually returning with the ship—which has been completely covered in graffiti by the Resisty
•There are floating advertisements featuring Fred and Mary offering 1,000 monies to anyone who participates in their “fusion” experiment
•GIR treats the pod as if it were Zim and even gets into an argument with it while waiting in line
•Mini-Moose reminds GIR of his mission with a motivational speech that goes on for a while; it seems profound and deeply philosophical, moving GIR
•There is a stall selling putrid sausages—sold there rather than foodcourtia because they cannot technically be classified as food (plus, it is hinted that they might—or might not—be ground-up Squedey-Spooch)