A young boy named Josh Baskin, wish one day from an old machine to be big, despite the fact that he does not believe it is going to work. He is very surprised, therefore, to find himself in the next day- big. Now he looks like a 30 years old guy, but he still behave like a twelve years boy. He decide to go with his best friend to New York, to find the machine that can fix his wish. In New York he gets a job in a toy company, and develop a relationship. Currently, he must learn to get used to the adults world he always wanted to be part of. Would he still like to remain an adult?