When Nathan's sister needs an organ transplant, it's his stepbrother, Mack, who the family turns to as Rosie's only potential living donor. Nathan's curiosity about the stepbrother he's never met turns to shock when he realises that Mack is his latest -- and hottest ever -- one-night stand.
Nathan and Mack agree to forget their single night together, but that's easier said than done. When Mack moves in to Nathan's place to recuperate after surgery, it's not just the sexual tension between them that keeps growing. Against all the odds, and despite Mack's wariness of intimacy, the two men grow close enough that Nathan begins to wonder what it would take to mend the rift that's kept Mack and his father estranged for over a decade . . . and whether Mack might consider staying with Nathan in Porthkennack for good.