On a remote Swedish island, a little girl, Klara, grows up without
a father. Now, twenty years later, she discovers a secret: a secret
that powerful men will kill to keep hidden. On the other side of
the world, an old spy hides from his past. He used to be the best
agent in the field. These days the only thing he lives for is
swimming in the local pool. Then, on Christmas eve, Klara is thrown
into a terrifying chase across Europe. Only the Swimmer can save
her. But time is running out...