It's Homecoming Weekend, and Casey's excited. Evan's blieblood parents are visiting and she is determined to wow them. But, sadly, her expectations far outweigh the outcome. Evan's parents can barely hide their boredom when they meet Casey over lunch. The only time they perk up is when Rebecca shows up uninvited they are very impressed with the senator's daughter! So impressed in fact, they force Evan to renege on an invitation.
Rusty is having better luck sort of. In honor of homecoming, Kappa Tau is throwing its biggest bash of the year, the Mt. Vesuvius Party, complete with exploding volcano. When a test run of the volcano shows it's a dud, Rusty offers to fix it but he can't.
Desperate, he decides to "borrow" the university's Atmospheric Destabalizer Module an armament relic that's never been fired and is slated to be destroyed. His partners in crime? Zeta Beta Zeta's Jen Z. and a very reluctant Dale.
Casey decides to crash the VIP dinner and show Evan's parents what she's made of but things don't work out as planned.
Back at Kappa Tau, Rusty and Dale hook up the Module at the party, and amid great fantare and expextation nothing happens.Rusty coudn't be more bummed, until the most amazing things happen. The volcano explodes, beer rains down, and Jen K,tells Rusty she likes him. By the end of Homecoming Weekend, both of the Cartwright kids have had their worlds rocked one happily, the other not so much.