After the success of Honey, I Shrunk the Kids, Rick Moranis returns as scientist Wayne Szalinski in Randal Klesier's family comedy. Now employed by a multi-national conglomerate, Wayne's job is to develop a process that can rapidly accelerate growth rather than cause shrinkage. But when one of his experiments goes wrong, his two-year-old son Adam grows to Godzilla-like proportions and finds himself in the biggest playground in the world - Las Vegas.