In Maryland, Becca and her sister, Rosaline, have forged ahead with family lives and careers, growing distant through time and circumstance. But when the body of an older woman is discovered at sunrise on Laxey Beach in the Isle of Man, it brings devastating news for the sisters.

Each sister flies out to the Isle of Man to discover and repatriate the body of their mother, Mary, who they learn has been living a double life, leaving their father Richard at home in Manchester, whilst creating another world for herself….. Maryland. Confined on the island with each other, the sisters can't escape the ripple effect of their mother's secrets and lies.