When the Widdershins sisters and Granny are called away in deepest winter to look after cousin Clarissa, it doesn't take long for adventure - or trouble - to find them. The town of Wilderness has plenty to explore with its frozen lake and winter market, as well as being haunted by a doomed highwayman and his secret love. But the legends are true and seeing a ghostly figure one night, the girls realise that Granny is in terrible danger. As an icy storm rages, the race to save her begins - can the sisters lay Wilderness's ghosts to rest before another soul is claimed?