When Dr. Dandelion engineers a Stink Monster odorous enough to force all the residents out of town, our Superheroes must find a way to defeat the ever-growing Stink Monster before it turns Greenville into Stinkville!

Beatrix runs away after feeling neglected when Riley is so focused on writing a new song. However, Beatrix is in for a big surprise when she accidentally eats some of Dr. Dandelion's Gigantor Cabbage and grows to the size of a building!

Megablast decides to sample one of Riley's mom's old hits. Meanwhile, Dr. Dandelion has created a giant plant penthouse over Greenville! The kids must stop the pilfering plant before its weight collapses on the town!

Aunt Jenny is on her way to a family hoedown in the country but is stopped when Dr. Dandelion turns the streets of Greenville into swampland! It's up to Megablast to help Aunt Jenny and Greenville return the swampy streets to normal!

When Riley thinks her parents are about to move their family away, she tries to remind them how awesome Greenville is! But it proves to be challenging, as Dr. Dandelion is also out to try and convince everyone else to move away too