Handy Bob needs to keep on his toes at the lively Lakeside School gym. He swings his mop and swabs with pride and flings soapy suds aside. This lovable school custodian is soon at his wits' end, however, as bustling students trek dirt, grime, grit, and slime across his freshly mopped floor. But help is afoot! Without missing a beat, the children help clear the mess.