Hong Kong, 1953: In a remote mansion, witnesses insist a massacre took place. The police see nothing but pristine rooms and declare it a collective hallucination. Until decades later, when one witness returns…from the Edgar®-nominated author of The Last Russian Doll.

In 1950s Hong Kong, Mei is a young refugee of the Chinese Communist revolution struggling to put her past in Shanghai behind her. When she receives a shocking invitation—to take part in a competition in one of the city's most notorious haunted houses, pitting six spirit mediums against one another in a series of six séances over six nights, until a single winner emerges—she has every reason to refuse.

Except that the hostess, a former Shanghainese silent film star, is none other than the wife of the man who once destroyed Mei’s entire life.

It is promised the winner will receive a fortune, but there is only one prize Mei wants: revenge.

Decades later, the final night of that competition has become an infamous urban legend: The police were called to the scene of a brutal massacre but found no evidence, dismissing it as a collective hallucination. Mei knows what she saw, but now someone else is convinced they know what she did. She must uncover the truth about the last night she ever spent in that house—even if the ghosts of her past are waiting for her there....