A Nordic psychological drama about a young family leaving behind their urban existence to start a new life in an isolated forest. In this haven of peace the couple face their deepest fears and inexplicable phenomena.
Stine and Teit have decided to escape Copenhagen's rat race and retreat to a remote cabin in Sweden's vast woods, together with their young son Nemo. She hopes to work on her first novel. He intends to document their 'adventure' in a series of podcasts. But it doesn't take long before they spot people across the lake outside the cabin. Stine spots another person, and she leaves Nemo out of her sight for a moment. Once she reunites with him the boy stubbornly denies that she is his mother. Stine and Teit decide to abandon their plans and go home, only to find out that no matter what road they take they always end up back at the cabin. And then a pair of angry doppelgängers show up, looking for their young son.
"This is not your doppelganger thriller of the gothic variety. Note the title: in physics, superposition means (per Merriam-Webster) "the combination of two distinct physical phenomena of the same type (such as spin or wavelength) so that they coexist as part of the same event". This is more a metaphysical meditation towards the realisation that none of us is ever alone, but also never unique." (Olaf Möller, Rotterdam International Film Festival)