Mary Bunting is sitting alone when to her surprise and delight a rabbit six foot tall - elegantly dressed in frock coat and fancy waistcoat - appears. As he is a magic rabbit, he can be seen only by Mary, which naturally creates great confusion and misunderstanding.

A cat and mouse game develops between a big man of crime and a young detective constable. But the big man doesn't realize, that this mouse roars.

Stephen Chambers, a new master of Warby Stones school for the 'ultra-intelligent boys', finds strange things happening to him. Reason tells him that they must be linked with the boys' Psychic Phenomena Club.