They receive occasional visits from child care workers Grete and Ole, who warn Anna that her ex-husband may reopen a custody case for Anders.
Initially, Anna forces Anders to sleep in her room, but when the case workers discourage this, she buys a babycall (baby monitor) to keep an eye on him.
At an electronics store, Anna meets Helge, a shy man whose mother is terminally ill in the hospital.
Anna discovers a disturbing picture drawn by Anders, depicting a dead body covered in blood near their apartment complex.
In the forest, he finds a buried body, presumed to be the boy who claimed to be Anders' friend, murdered by his abusive parents.
The movie concludes with a happy scene of Anna and Anders walking together in the forest, then sitting by the water's edge.
[2] Kim Newman of Empire called it "genuinely creepy" and summarised it as "another Scandinavian thriller that will nestle uncomfortably in your head".
[3] Philip French of The Observer judged "The film and Rapace command our attention, though at the end one feels Norway has used up the whole of this year's quota of red herrings.
"[4] Peter Bradshaw of The Guardian was less positive, writing "It's a great idea for a thriller - but then other plotlines get muddled in, and everything unravels into a cop-out.
"[5][6] Henry Fitzherbert of the Daily Express wrote "It's a great idea but there are too many confusing sub-plots and no satisfactory resolution.