Ignoring her heart risks, Laine Quinn insists on surgery to have a child for her husband, Nick Holden, unaware he is having an affair with Isla Benton, a trainee anesthetist. During the procedure, Isla deliberately administers the wrong anesthetic. Nick abandons resuscitation efforts to evade responsibility. In the crisis, Laine's first love, cardiac surgeon Zane Hawk, returns and saves her. The truth is exposed, shattering Nick's career ambitions and leading to his professional blacklisting and divorce from Laine. After recovering, Laine accepts Zane's proposal, finding new happiness.