Scientist Wayne Salinsky (Rick Moranis Rick Moranis) invented a machine that can zoom in and out of objects, but he forgot to tell his two children when he was happy. So this magical device shrinks both his children and the two children in the neighborhood. The four children embarked on an exciting and magical journey. The short, flat lawn in the yard turned into a towering, dense tropical rain forest, insignificant insects turned into ferocious beasts, and previously ordinary things suddenly turned into giant obstacles. However, it was only when the careless couple found out that their children were missing that they realized that something was wrong. How can we change the children back to what they used to be? The most important question at this time is which corner they are around.