In the heart of Louisiana's Atchafalaya Basin, a letter sent from an isolated settlement, addressed to Hautes-Pyrenees, France, and marked undeliverable, shows up at the Bayou Chene post office. That same day locals find a dog, nearly dead and tethered to an empty skiff. Odd yet seemingly trivial, the arrival of a masterless dog and a returned letter triggers a series of events that will dramatically change the lives of three friends and affect all of the residents of Bayou Chene.