When the will of a recently deceased ladies' man mandates a summer-long reunion for his daughters from different marriages at his posh Nantucket house, the three sisters are forced to confront long-festering resentments and misunderstandings as well as challenges in their private and professional lives, a situation that is complicated by a shocking revelation and the arrival of their mothers.

Attempting to win the favor of the Hotel Nantucket’s new London billionaire owner, general manager Lizbet Keaton, with drama behind closed doors, staff and guests with complicated pasts, a ghost roaming the halls and her own romantic uncertainty, has her work cut out for her.

Newly widowed, Eleanor Sunderland finds dreams of a family reunion in Nantucket shattered when her money-driven children suggest she sell the house and move to a retirement home, and finds a lone ally in her 22-year-old granddaughter, Ari, who moves in with her for the summer.