A young man and his three younger siblings, who have kept secret the death of their beloved mother in order to remain together, are plagued by a sinister presence in the sprawling manor in which they live.

A woman brings her family back to her childhood home, which used to be an orphanage for handicapped children. Before long, her son starts to communicate with an invisible new friend.

A regular family - Maria (Naomi Watts), Henry (Ewan McGregor) and their three kids - travel to Thailand to spend Christmas. They get an upgrade to a villa on the coastline. After settling in and exchanging gifts, they go to the pool, like so many other tourists. A perfect paradise vacation until a distant noise becomes a roar. There is no time to escape from the tsunami; Maria and her eldest are swept one way, Henry and the youngest another. Who will survive, and what will become of them?