Paulo works as night security in a deactivated industrial complex. He lost his daughter in dramatic circumstances, and no regrets would console him. He sleeps at Luisa's house and witnesses the repeated transgressions of an unstable neighbour. Everything threatens to crack.
It’s Autumn. A young woman and an older man travel by train to Douro, looking for a light phenomenon. They wait during the day but it’s in the silence of the night that things starts to appear. The invisible becomes visible, but is it still possible to believe?
