In part 2 of "NERD Throws PARTY Behind Parents' Back," Nelson grapples with the aftermath of his wild party. He wakes up to a trashed house and a broken vase, a precious family heirloom, just as his parents announce they're returning early. As panic sets in, his friends bail on him, leaving him to clean up the mess alone.

Despite his troubles, Shannon's car is scratched, and he desperately tries to figure out how to fix everything before his parents arrive. He seeks help from a friendly mechanic, who empathizes with his situation. Eventually, his true friend steps in with cleaning supplies, helping him confront the chaos.

As they work together, Nelson realizes who his real friends are. The situation takes a twist when he learns Shannon was using him all along. After some clever maneuvering, he manages to keep his parents in the dark about the party.

However, when Nelson's mom arrives unexpectedly, she's furious after discovering the mess and the car damage. The episode closes with Nelson facing consequences but finding solace in his friendship, setting the stage for potential revenge on Shannon. The tension builds as he plots his next move against those who wronged him.