As the assistant to Margo Maloo, Charles has gone on assignment in some pretty interesting locations. He\'s been to a vampire\'s lair, an ogre\'s den, and even a monster grocery store! But he\'s never been to Downside, Echo City\'s underground monster metropolis that is super mysterious and definitely off limits to kids. But a settlement of giant spiders is about to be dynamited by unwitting construction workers - and, coincidentally, one of those giant spiders \'accidentally\' bit Charles. His cure and the spiders\' salvation lie in the Downside - if Charles and Margo can make it in time. (W/A/CA) Drew Weing