Jill goes pony trekking with the Merrivales, reliving some of the idyllic moments of their youth. But Jill has this happy knack of falling into adventure and along the way she gets mixed up with an extremely dishy young movie star - Beau Carlisle. The newshounds are after them and this adds an extra note of glamour and excitement to a pony trek across Dartmoor, reknown for ghosts and evil spirits that used to walk through the ancient forests and treacherous peat bogs.