Two years after exposing her husband Simon's betrayal, life seems good for Doctor Gemma Foster. But when Simon reappears, things quickly fall apart. Gemma's life is suddenly complicated by sexual tensions and destructive obsessions, while she desperately tries to create stability for her teenage son Tom. Dark, adult, and psychologically raw, season two is packed with gripping drama and explosive twists, as Gemma goes further than ever before to protect the people she loves.