While vacationing on a houseboat situated smack dab in the middle of a dry lake bed, the Stanton kids and their cousins discover a time machine that makes their lives a whole lot more interesting...and without a doubt more dangerous! While holidaying on a houseboat in the middle of a dry lake bed, the Stanton kids and their cousins find a time machine that someone is apparently using for their own evil purposes. When they discover that Mr. Powers is the reason for water disappearing from the lake, they have to use all their scientific knowledge and imagination to outwit the culprit and his crazed plans while travelling backwards and forwards in time. No future vacation will ever be as exciting!