Solstice

While on a summer trip with her friends, Megan begins to feel the presence of Sophie, her twin sister who recently committed suicide.

Solstice is a 2008 mystery horror movie directed by Daniel Myrick, starring Elisabeth Harnois, Shawn Ashmore, Amanda Seyfried. It holds an IMDb rating of 5.3/10 from 7,252 votes and runs 1h 31m.