Danielle Morrow works tirelessly for the greyhound rescue as an adoption coordinator, rehabilitating retired racing dogs and helping them find forever homes. She guards her heart as vigilantly as her two adopted greyhounds guard her home. One heartbreak per lifetime is enough for any woman, and no one she's met since her high-school boyfriend dumped her to join the military has ever tempted her enough to risk love again.Knox Donovan expected to be career military, but an injury has resulted in an honorable discharge that leaves him uncertain of his future. When his brothers ask him to come back to Miami Beach to help manage their new condo conversion, he figures he can at least advise them about security systems before declining the job. He has no intention of staying in the city that has so many bad memories for him.But Knox is reminded that not all his memories of growing up in Miami Beach are bad when he sees Danielle again at the Grand Opening of the new Fur Haven Dog Park. Fifteen years haven't softened the pain of their breakup. But Knox is different now, more hard-edged and suspicious, and when he bonds with the retired racing greyhound, Sarge, Danielle's cool reserve begins to melt. Sarge needs special care after the injuries that ended his racing career, and it's not long before she realizes that Knox does too. Can she trust her heart to the only man who's ever broken it?