A mysterious teen is found wandering in traffic and is taken to a detention facility. Nicole Trager, a psychologist, examines him and then takes him home to her family. The Trager kids and Nicole's husband have a difficult time dealing with Kyle at first, but slowly Kyle gets them to accept him.
A sleepless Kyle tries to understand the concept of time, while the Trager family tries to find ways to make him fall asleep. Nothing seems to work, which frustrates everyone in the family, and puts strain on Nicole and Stephen's marriage. Realizing this, Kyle runs away to the woods where he was first found. When the family finds him he is finally exhausted and ready to sleep.
A skeleton was found in the woods right next to the spot where Kyle was found. Detective Breen tells this to Nicole, trying to get her to enlist Kyle's help on gaining any leads to the case. A strange man, who seems to be a murderer, continues to follow Kyle. Kyle learns about lies through each member of the Trager family.
Kyle, Lori, and Josh deal with their romantic problems. Kyle gets an erection in front of a large group of people, so Stephen explains "the birds and the bees" to him. Kyle deals with his feelings towards Amanda. Lori decides to loose her virginity to Declan after he asks her out. Hillary makes a move on Kyle.
Kyle has his first day at school. Hillary makes life at school difficult for Lori. Josh is put in a remedial class. Tom Foss bugs the Trager household.
It's Lori's birthday. Kyle is starting to get frustrated with his inability to remember the past. He begins to have nightmares. Declan shows up at Kyle's window at night, in trouble and needing a place to stay.
Nicole searches deeper to uncover information about the man in Kyle's dreams and the missing professor. Kyle joins the school's basketball team just in time for the championship game. His actions surprise everyone.
Nicole brings home a hypnotherapist to try and help Kyle remember his past. While hypnotized, Kyle says that Thomas Foss killed the professor. He also mumbles a starnge assortment of numbers and letters, including the numbers from the Ouija board.
Kyle discovers he's a master lip-reader and has super hearing. He and Declan investigate Tom Foss and realize he's got the Trager house on surveillance.
A couple, who claims to be Kyle's parents, shows up to take him home. Everyone is skeptical, but a DNA test proves that they are a match. While taking some time to himself, Kyle is smothered with chloroform.