How could you ever choose between your own life and the life of your child?

Newly-weds Holly and Tom have just moved into an old manor house in the picturesque English countryside. When Holly discovers a moondial in the overgrown garden and its strange crystal mechanism, little does she suspect that it will change her life forever. For the moondial has a curse.

Each full moon, Holly can see into the future – a future which holds Tom cradling their baby daughter, Libby, and mourning Holly’s death in childbirth…

Holly realises the moondial is offering her a desperate choice: give Tom the baby he has always wanted and sacrifice her own life; or save herself and erase the life of the daughter she has fallen in love with.