When Jessie (Romijn-Stamos) and Paul's (Kinnear) eight year old son Adam is tragically killed on his birthday, Richard (De Niro), a doctor on the forefront of genetic research, leads the couple in a desperate attempt to clone their son. The experiment is successful and under Richard's watchful eye, Adam grows into a healthy and happy young boy, until his 8th birthday. After his birthday, things go horribly wrong.