Millie, Lou, and Cornwallis search the forest for a shy forest folkie, Yooty. Millie can't wait to become friends but Lou is very scared of her loud growl.
Putting off tidying up for too long has attracted Yukky Nummy to Millie and Lou's tent. He's very cute but Lou can't stand their stinky new friend's messy lifestyle.
Millie and Yooty search for Lou who has accidentally become Babby Yaggy's new assistant. He's certain that she's brewing an evil potion to destroy the forest and tries his best to stop her.
Millie summons the Gremmies to fix her scooter but ends up receiving a number of unwanted upgrades for their tent. The problem is that the Gremmies are not very good at planning, leaving the fate of the tent up in the air.
Millie and Lou can't wait for Namu Namu's party but they have no idea how to get there. Luckily, Tikky knows exactly where to go but why does it take so long?
It's time for Pippi's magic show but is he really as powerful as he says he is? Why would a folkie so great be left out of the Big Book of Forest Folk?
Lou's having the best day ever until Ness shows up with an important mission to protect a rare mushroom. Millie and Cornwallis help but don't take it seriously enough, triggering Ness's bad temper.
Oh no, somebody is up to no good. Everyone is being pranked with terrible jokes. Millie and Lou are going to find out who's responsible with the help of Shurman who has coincidentally decided to visit them today.