Scarred physically and emotionally from a dog attack at age nine, Aaron Cassidy has spent the last seven years breaking out in a cold sweat at the mere sound of a bark in the distance. Days after he receives his driver's license, he decides to challenge his bone-deep fear once and for all.

Volunteering at the Happy Endings Animal Foundation gives Aaron a new sense of purpose. Here he'll face his fears and learn to love man's best friend. When an abused pit bull with scars mirroring his own arrives at the shelter, Aaron cannot even be in the same room without lapsing into his familiar, paralyzing terror. But as he gets to know the wounded animal, and the two learn to trust again, Aaron finds that sometimes all you need is a little...Chance.