It was only meant to be one night of pleasure... After a failed engagement, paleontologist Heather "Heart" Carvalho has vowed to always protect herself in love. When she's hired to conduct a geophysical survey for a mineral rights dispute on ancient land, she never expects to be swept up in the arms of a rugged cowboy. After a night of passion, she learns the handsome cowboy is her new client. Even more complicated, he has kids, and soon Heart longs for something she knows she can never have...a family. Tyler Dixon doesn't have time for emotional attachments. He has two sons to raise solo, a multimillion-dollar ranch to operate, and a pending lawsuit to protect his land from an unscrupulous oil company. Carrying on with the gorgeous, free-spirited paleontologist will only jeopardize Tyler's case. So why does he feel the impulse to keep crossing the line with her? They're both everything they told themselves they didn't want. As their chemistry burns, Heart claims she can remain impartial, but soon Ty wants the one thing she's sworn to never again give away-her heart.