While a woman attempts to cover up her daughter's murder and reinvent her life, her sister is visited by their mother, who was thought to have died.

What begins as an ordinary board in a traditional apartment building to vote the renewal of the elevator, turns into an unexpected debate about the limits of pacific coexistence.

The alarm tells the strange experiences faced by a group of characters in a near and dystopian future. No one knows exactly why, but it is impossible to go outside. A couple is forced to live with an unknown family while the world beyond the windows of their house seems to disintegrate forever. But the biggest threat of all might be inside, in the exact center of the dining room table. Or at the bottom of the nightstand drawer. Or in the past.