It’s 1995 in Baton Rouge, Louisiana. During a feminist studies class, college student Kristi opens her textbook to discover something that turns her world upside down. For as long as she can remember, Kristi has felt different- now she knows why. Demanding her medical records, Kristi is finally confronted with the devastating truth: she has been lied to all her life by those she trusted the most. What follows is the unearthing of an extraordinary and disturbing secret that goes far beyond her own life, leading to the discovery of a psychology experiment on a pair of twins – once hailed as a revolutionary success but now revealed to be a terrible lie affecting thousands around the world.