Guard Your Heart - Trust No One Until his last mission, British military medic Luke McLaren kept his oath, 'Do No Harm'. Then he fails to save his best friend, Mike. Mike's sister, midwife Kate Gibson, doesn't believe in happy endings. Not since her father deserted her family when she was a child. Now her brother's been killed on a mission. After one night of make-me-forget sex, Luke knows Kate is the only woman he will ever want but can never have. Years later, when Kate asks for Luke's help to expose a bomb threat, he has no choice, thanks to his deathbed promise to Mike to protect her. With their hotter than hell connection reignited, Luke and Kate must face their personal demons and the enemy if they are to survive and claim a future together.