When a visiting troupe hypnotizes some of the people of Midvale and a mysterious string of robberies ensues, Sean and Melissa use their detective skills to find the thief.
A rash of burglaries hits Midvale at the same time as the rock band Spice Army arrives to give a concert and the oscillating audio spectroscope starts picking up strange signals from outer space.
After a strange lady curses the town of Midvale, a series of mishaps has everyone worried, until Sean and his sister Melissa can figure out what is really happening.