In the near future, a mysterious sleeping sickness spreads across Egypt. Yusuf, an overworked paramedic, patrols Cairo's streets fighting to save abandoned sleepers from dehydration and death. One day, his wife, Nour, an astronomer, disappears after observing a wormhole during a solar eclipse. That night, Yusuf searches desperately for her before collapsing into sleep himself. He wakes in the hospital to learn that Nour contracted the illness and died, but her body wasn’t found.

Yusuf raises their deaf daughter, Leil, alone. But grief prevents them from speaking openly about the night they lost Nour. When Nour's sister Fatima dies from an apparent suicide, Leil finds a photograph among her belongings: a pixelated black vortex in the Sun's corona. Her mother's last discovery. Sitting together through the long night before Fatima's burial, they finally tell each other what they couldn't say for years. Yusuf describes the night he failed to save Nour. And Leil confesses that she witnessed her mother's kidnapping — but remained silent out of fear. Burdened by guilt, Leil began having the same dream every night. She sends her voice through the wormhole, back in time, into her father's sleeping mind. She begs him to save her mother. But when she wakes up, Nour is always gone.