In the 1950s, the alluring Rebecca Blaine ruled Long Island's Gold Coast from Cadieux House, a gift of love from the brilliant architect Marius Cadieux. Today, as architect Wren Fontaine restores the house, she becomes immersed in a seventy-five-year-old murder, as well as fresh killings that echo it. To make it even more complicated, Cadieux was an important mentor to Wren's father, who isn't happy about Wren "fixing" the home. Wren must think back to her childhood, when the elderly Cadieux gave her a riddle about a love triangle. She knows she must solve it to understand the house—and stop the killings. And meanwhile, Rebecca and Cadieux haunt the house ...