Two young boys Ellis and Neckbone were finding a boat that places on a tree. When they found it, it seemed someone's living there. They encountered a man named Mud. They made a deal that if the boys help Mud, he'll give the gun he has.
Actually Mud killed a person who hooked up with Juniper who Mud loves and is waiting for.
Ellis was impressed how much Mud loves her and wanted him to help for a true love.
He wants to believe in true love because his parents are in the middle of getting divorced, also he is in love with a girl.
It's all about love.
Family, friends, lover. Love is simple but sometimes complicated. Spending time with Mud gave Ellis this idea. That made him a bit adult.