The Sweetheart Sisters are ready to give some old-school lessons in love... Rescue Bay veterinarian Diana Tuttle is a great single mom, but she has a harder time taking care of herself. Having been burned in the past by her son's noncommittal father, the last thing she wants is a man who isn't in it for the long haul-until a foolish one-night stand from her past walks back into her life. Coast Guard Lieutenant Mike Stark has never wanted to settle down. But when his ex-wife leaves their two small children on his doorstep, he is forced to become a family man in a hurry. His return to Rescue Bay, Florida and fatherhood isn't easy, but reconnecting with Diana makes the challenge all the more worthwhile. Except becoming the long-term lover she has in mind may be one commitment too many... Luckily, when Diana's and Mike's pasts begin to threaten their future, the Sweetheart Sisters have the perfect scheme to make this second chance last a lifetime.