[Kim Raver, who stars in Lifetime's upcoming original movie Haunting Sarah , told SCI FI Wire she appears in nearly every frame of the film, and half the time she's in it twice, playing identical twin sisters Erica and Heather Rose.] It's a story about two sisters that have to deal with a terrible loss, ... It's an interesting concept. ... How far do you go with wanting your child back? And that's where it kind of crosses that line into the supernatural. So it's their journey, their relationship. Kim Raver