A teenager wakes up in a subway car with no memory of how he got there or who he is.
Young lawyer Iris discovers that she has an older, autistic half-brother Ray, who is in prison for the atrocious murder of his neighbour and her five-year-old daughter. When she meets Ray he reminds her a lot of her own son Aron, who also is autistic, and she starts to believe that he is innocent.
When Sam regains consciousness in the middle of a crowded subway, he doesn't know how he got there, where he came from nor his own name. He franticly searches for his identity, using the contents of his backpack. Slowly but surely he realizes his life is in great danger.
