The day after James kills a fly, Mr. McFly reveals his grandmother is missing. Thinking he killed Grandma McFly, James scrambles to cover up his crime.
Instead of confronting Echo about her messiness, James tries to passive-aggressively get her to move out of the RV... but the plan blows up in his face.
When the parents in Dirt ban their kids from doing anything risky, James starts a pillow fight club for his peers to release all of their excess energy.
Believing he's in a "kid-life crisis," James decides to take a day off from school, but it's repeatedly interrupted by a pesky door-to-door salesperson.
Mr. McFly promises the class pizza if they take care of a flour "baby" for the day. But James struggles to cope when Max bails on him for a new partner.
While sneaking into the teachers lounge to snag sweet treats, James is mistaken for a substitute teacher and faces the wrath of a competitive Mr. McFly.
James get obsessed with a maze in the back of a cereal box, making him forget to do his oral report, so he makes up a lie that there is secret treasure in Dirt, but Dirt then falls into chaos finding the "secret treasure."
James and Max bond with their sentient toaster, Toasty, now Declan who is now going through puberty. But after an argument, Declan goes on a rampage around Dirt, and James, Max, and Echo are the only ones who can save Dirt.