In a retro-steampunk world set in 1922 England, a little boy named Sir Thomas Tattletale resides at Tattletale manor with his mother Lady Tatiana Tattletale. He possesses the special gift of laughter with incredible healing power. A wealthy family member soon discovers his power and sets off trying to kidnap him.Unfortunately for this rather sinister family member, Sir Thomas' cleverness combined with two eccentric aunts, a night club singer and a stunt flyer, make the task difficult. On his travels, Sir Thomas meets new friends along the way: Chronas Clockwork from Chicago, Gloria Peekaboo of Pennsylvania, Zara Zuckerman of Zimbabwe, Betsy Sassafras of Mexico, and Philippe de Curieuse of France.