Mona the Vampire - Series 2/3 Compilation - Monster Mobile/The Columbus Triangle

Cartoon adventures of a ten-year-old girl who solves ghoulish mysteries. In Monster Mobile, Mona's curiosity is aroused by a mysterious limousine cruising around town which is causing adults to loose their confidence prior to the big high-school reunion. In The Columbus Triangle, a radio transmitter is causing strange sonic disturbances in the town. Is it reversing the town's polarity?