Tales of the Dragonfly Book I: In Tandem by Tamara Ferguson

Fifteen years earlier, Jake Loughlin and Danielle Reardon were separated.
Dragonfly Pointe's unsolved brutal assault and murder of a six-year old girl over twenty years before has remained unsolved. Jake is a special investigator for the FBI and a successful businessman. As new owner of the Dragonfly Pointe Inn, Jake has returned to restore and renovate the abandoned property - and secretly investigate the tragic death. He has a theory there is a human trafficking ring operating nearby and there could be a connection to the death of the little girl at Dragonfly Pointe twenty-two years earlier.
Danielle's grandmother has passed away, and she has returned to Crystal Rock after being a model, and a vocalist for a band, Danielle's boyfriend died of a drug overdose and she decided to leave the life of a celebrity behind. She obtained a degree in horticulture and started a successful landscaping business in New York.
Jake and Danielle meet again, and the spark is still there after all the time apart. He knows he has always loved her. The sparks fly between them as his investigation picks up. A local girl and friend of Danielle's falls victim to kidnapping. Jake has to confess some secrets to Danielle about his job and they have to work together quickly to save the girl and stop the crime ring.
I enjoyed this story very much - the romance and the mystery, and some nail-biting moments of suspense. I recommend it!