While on a summer trip with her friends, Megan begins to feel the presence of Sophie, her twin sister who recently committed suicide.
Elisabeth Harnois
as Megan / Sophie
Shawn Ashmore
as Christian
Amanda Seyfried
as Zoe
Hilarie Burton
as Alicia
Tyler Hoechlin
as Nick
Matt O'Leary
as Mark
Lisa Arnold
as Mrs. Thomas
R. Lee Ermey
as Leonard
Lyle Brocato
as Partier
David Dahlgren
as Mr. Thomas
Jenna Hildebrand
as Malin (as Jenna Lynn Hildebrand)
Mark Krasnoff
as Cop
