Follow Wrinkles Wallace and his crew in another zany adventure! They managed to pass 5th grade, but this time in their topsy-turvy world, their now 11-year-old teacher, Mr. Sittin' B. Quiet, and his family find themselves on the verge of foreclosure. All your favorite characters are asked to attend a "Sleepover to Remember," to find some way to raise more than $22,000--overnight! Wrinkles and his off-beat friends team up with their talents, adding a new member along the way, and use their wits and determination to try and save the Quiets' house before the bankers come on Monday.