An uplifting and unforgettable story of a US Marine, his extraordinary dog, and the road trip of a lifetime. When US Marine Rob Kugler returns home from war lost in grief, he finds solace in his chocolate lab Bella. Then Bella develops cancer in her front leg. Rob can let Bella go now, or amputate her cancer riddled leg and see what the next few months will bring. For Rob, the choice is a no-brainer. Rob and Bella hit the road, and as they criss-cross the country they meet remarkable, life-changing men and women who are quick to make friends with this incredible three-legged dog.