The already dysfunctional lives of Helen, Jake and Natalie are thrown into disarray when their recently widowed mother Vivien declares she's in love with a new man. Their suspicions are heightened as retired surgeon Mark sweeps their mother off her feet, shifting her priorities away from her children. Years of secrets, lies, rivalries and betrayals come to the surface and threaten to blow apart everything they've held dear. With their large family home, inheritance and happy childhood memories all at risk, the siblings attempt to find out more about Mark. But will their long-buried grudges, complex relationships and complicated personal lives allow them to pull together?