No matter how hard she tries, Sammy can't stay out of trouble – with her teacher, with the school bully, and especially with her mother. When she rescues an abused dog, Sammy's sure that Jack will love her as much as she loves him. 

But the pup has never learned to be a good dog. He tears up the house, threatens to bite her mom, and won't do anything Sammy tells him to do. The more Sammy tries to care for the dog, the more things go wrong. Her messed-up life just gets worse and worse. 

Sammy held out her hand. Jack cringed back and whined.

"Oh, sweetheart! I'll never hurt you." Instinctively, Sammy crouched down and held out her arms. Slowly Jack's head extended. She held her breath. His nose touched the back of her hand, cool, gentle. His eyes held hers, and her fingers extended to brush the soft tip of his ear.

Sammy won't give up on Jack – not ever. But when danger threatens the family, can Sammy depend on Jack to save them all?