Goo stops by Foster's for some rainy-day activities. She accidentally blows a fuse and causes the electricity to go out. Eduardo is fairly unfazed and continues to play pretend. Goo exclaims that she loves pretend, but Mac reminds her that she's not allowed to imagine things because of the problems it caused last time
. She shows him that she can now control her imagination, so they all play make believe. Mac and Bloo think they have created a way to defeat Goo's army. She spends the rest of the day trying to come up with ways to defend the attack, but accidentally creates some villainous new friends.