In a small town in Arkansas, two young friends, Ellis and Neckbone, discover a mysterious boat stranded on an island in the Mississippi River. As they investigate, they encounter an enigmatic fugitive named Mud, who lives in isolation and seeks to reunite with his lost love, Juniper. Mud tells them a thrilling story of betrayal and heartbreak, and an unexpected bond quickly forms between them. With an aura of danger surrounding them, Ellis and Neckbone decide to help Mud escape the law and reunite with Juniper, becoming his accomplices.
However, the boys' innocent adventure soon turns into an intense game of survival. As they delve deeper into Mud's world, they discover that things are not what they seem. Tensions rise as the police and other dangers loom, and Ellis begins to question his own understanding of love and loyalty. His relationship with Neckbone is also put to the test as they both face difficult decisions that will challenge their friendship. Set against a backdrop of stunning natural landscapes and a narrative full of emotion, this story explores the complex paths of love, betrayal, and personal growth as the boys try to help a deeply broken man find his way back home.