Episode 1
Tolly is invited by his great-grandmother to spend Christmas at her remote and mysterious house in the country.
Episode 2
Tolly tries desperately to find the other children that he knows are in the house somewhere.
Episode 3
Tolly meets the other children at last and learns from them about the 'demon tree'.
Episode 4
Tolly is very nearly another victim of the Oldknow curse.
