She stays out behind her garbage-hauling family's mansion in a kookily appointed bus. He is the poor son of a mean ex-con. Quickly, awkwardly, the misfits bond and set off on an innocent road trip to Canada that twists into a crime spree.
All adults are bad or weird.
Nobody understands them. Marcy and Seth don't really mean to hurt people. Marcy suffers from a weird combination of Tourette's and obsessive compulsive disorders that make her shake and repeat words and grab at people and, occasionally attack them. Alcohol helps a bit. So does sex.