Marga lost her sister in a tragic accident when they were children. Years later, Marga is having relationship problems. So she decides to get some space and visit the old family home.
But strange things start happening, and she discovers a portal to another reality, one where her sister is alive and grown-up.
But in that parallel dimension, her sister and her other self warn Marga that something terrible is about to happen, but who can she trust.
A tense thriller with some well-crafted twists and turns.