After escaping certain death, deep–cover agent Colin Donovan is back home on the Maine coast with his new love, FBI art crimes expert Emma Sharpe. Then Tatiana Pavlova, a London–based jewellery designer, arrives in Heron's Cove, asking for Emma's help– a prized collection from a lost era of Russian opulence has resurfaced, and Tatiana warns Emma it's about to be stolen again. And Colin realises his nightmare isn't over…it's just begun.

Emma guards her past closely, and Colin is determined to unlock her secrets. As they investigate the mysterious collection and the equally mysterious Tatiana, they confront their greatest challenge. Now they must count on their expertise– and each other– to outwit an enemy who wants to destroy them and everyone they love most.