Moscow, 2020. The media warn that a dangerous meteorite will soon sweep near the Earth at great speed. But the wealthy restaurateur Vadim does not care, so he does not change his plans and hurries to celebrate the purchase of a new establishment. On the way to the restaurant, Vadim calls his friend Nina to invite her to a banquet. But due to a time anomaly associated with a meteorite, another Nina, a thirteen-year-old girl who is dying of starvation in cold Moscow in 1942, picks up the phone on the other end.

The Artek International Children's Center has always been a land of sunshine and loud laughter, but these camps will be special. While an obsessed astronomy professor scours the surrounding area in search of a fallen meteorite for long-awaited glory, inexplicable things begin to happen at the camp. One by one, the most active children turn into "shadows": they lose interest in games, friends, and life, sinking into a frightening apathy. A group of teenagers uncovers an incredible truth: aliens are lurking within the camp, literally draining the children of their joy and happiest memories.