The cartoon adventures of a ten-year-old girl who solves ghoulish mysteries.

When Miss Gotto falls ill and is replaced by a substitute, Mona immediately suspects foul play. The substitute teacher seems no ordinary teacher: he hears even the faintest whisper, he writes in bizarre ciphers, and she could swear that he has a third eye at the back of his head. When a second teacher falls ill and is also replaced Mona realises there is more to this than meets the eye and sets out to investigate. Show less