The suicide of twin sister Sophie (Elisabeth Harnois Elizabeth Hanois) makes Megan (Elisabeth Harnois) sad, and she never stops missing for the next six months. When the Summer Solstice arrives, Megan and Christian (Shawn Ashmore), Joey (Amanda Seyfried), Mark (Matt O'Leary) and Eliza (Hilarie Burton) go to their villa in Lake Noville, Louisiana for a holiday. By chance, Megan saw from a local magazine the way the Summer Solstice could communicate with the dead on the same day. She tried to do so, supernatural phenomena continued to appear, and Megan inadvertently discovered the secret of her sister's suicide.