The Barrett family lives in an ideal suburban community in the United States. The hostess, Lais (Keri Russell), is beautiful and dignified, and is a capable real estate agent; the male host, Daniel (Josh Hamilton), is in a bottleneck period of his career, and his heart is full of anxiety and uneasiness. The two sons, Jesse (Dakota Goyo) and Sam (Kadan Rockett), are naughty and cute, and have a deep relationship. One night, the sliding door leading to the yard of the Barrett family was opened, and the food in the refrigerator was messed up. It seems that from this day on, all kinds of strange things have appeared in this family one after another. Little Sam claims that aliens have come to the house, but the Barrett couple and the security personnel seem to regard a series of events in the house as a prank of the children. The weird things are getting worse and worse, far beyond the scope of the children's control. What is the truth...