While a murderer, Lucas, escapes during a prison transfer, a strange phenomenon suddenly disrupts the life of a village. One after another, the inhabitants fall into a prolonged sleep. It is in this climate of panic and anguish that Mathieu, a gendarmerie captain on the verge of divorce, must find Lucas and investigate a series of crimes. With the help of Elise, a sleep specialist who has come to the hospital as a backup, he will discover the origin of these mysterious sleepings, which is not unrelated to the murders he is investigating.