The joy of high school graduation is shattered for Megan (Elisabeth
Harnois) when her twin sister Sophie commits suicide at a christmas
party immediately after and argument between them.

Half a year later, Megan's friends are about to scatter to different
colleges. For one last time they head off for their annual tradition:
a weekend in the bayou for the summer solstice. Megan is at first
reluctant the lakeside cottage will evoke strong memories of Sophie,
but her sister's ex-boyfriend Christian persuades her to come.

The trip begins as a fun getaway with a burgeoning romance Megan and
Christian. However it develops an ominous overtone when Megan feels
the presence of her dead sister all around. Mysterious and eerie
events occur with ever greater frequency and intensity as she
realizes that Sophie might be urgently trying to contact her from the
grave.

Megan attempts to convince her friends that she is not imagining it
all, which becomes terrifyingly clear the night of the summer
solstice, when this world and the next are closest in harmonic
convergence.

An apparition from the other side appears to them, but it's not
Sophie, and the message it carries will change their lives forever.

http://www.solsticethemovie.com/