Reporter Grace Collier (Chloe Sevigny, TV's Big Love, American Psycho) witnesses a woman committing a bizarre murder in this disturbing shocker based on Brian de Palma's 1973 classic. When police fail to find a corpse or any trace of the crime, Collier undertakes her own investigation that leads her to a mental asylum and the discovery of the mysterious woman's once-conjoined twin. Stephen Rea also stars as the twins' controlling and controversial doctor in a chilling look at the deep and sometimes psychotic bond between Sisters.