Three generations of the Tremain family have occupied the idyllic cliffside cottage on the Cornish coast. There's Fred, the country doctor who built this house for his wife, Martha; their daughter Anna, an esteemed lawyer, and son Barnaby, a vicar to the local parish; and beloved granddaughter Lucy, who, on the cusp of adulthood, is faced with the prospect of leaving home -- and her family history -- forever.

But the past is never far behind, and before long Lucy discovers that the Tremain estate also harbors tragic lies and dangerous truths. When she finds a cache of long-hidden...