Trained as a search-and-rescue dog since puppyhood, Ellie can track and find people who are physically lost, but it is her owners, widower Jakob and lonely Maya, who challenge her to find a way to save people who are lost in other ways.

When Bailey meets eight-year-old Ethan, he quickly figures out his purpose: to play with the boy, to explore the Farm during summers with the boy, and to tidy the boy's dishes by licking them clean (only when Mom isn't watching). But Bailey soon learns that life isn't always so simple--that sometimes bad things happen--and that there can be no greater purpose than to protect the boy he loves.

The dog who thinks of himself as 'Bailey' knows one thing for sure: all dogs go to heaven after they have fulfilled their purpose on earth. But Bailey's work on earth is far from finished, there are still so many more humans that need a dog's talent for unconditional love. There is one family in particular that needs Bailey's help, a family that is on the verge of breaking apart. But if Bailey helps this family he won't remember his previous lives,...