"My friends and I used to play lying games. Now my twin sister is living one. When I was alive, my family seemed picture-perfect. My adoptive parents adored me, and my little sister, Laurel, copied my every move. But now that my long-lost twin, Emma, has taken my place to solve my murder, we're both learning just how flawed my family really is. Laurel is shooting Emma nasty looks and sneaking around with my ex-boyfriend. And it turns out my parents...

Poppy, Aster, Corrine, Natasha, and Rowan are the heiresses of the Saybrook's jewellery empire, a family business that is known for both its wealth, and a very old curse that leads to family members dying suddenly. When one of the 5 heiresses is killed, and an online gossip site publishes a statement "One Heiress Down, 4 more to go", an investigation is opened.