Young sweethearts Billy and Kate move to the Big Apple, land jobs in a high-tech office park and soon reunite with the friendly and lovable Gizmo. But a series of accidents creates a whole new generation of Gremlins. The situation worsens when the devilish green creatures invade a top-secret laboratory and develop genetically altered powers, making them even harder to destroy!

Set in 1920s Shanghai, ten-year-old Sam and 12-year-old Elle return the Mogwai Gizmo back home to the lush and perilous Valley of Jade.