Ben and his father have managed to rescue the others before the tower is blown up. But the gangsters are already in the process of reducing the entire site to rubble. As the friends and Professor Brehmer desperately search for a way out, they dramatically realize the extent of the destruction. If the gangsters' plan should come to fruition in the next 4 hours, no one will be able to stop them. That's when a new, massive explosion rocks the kids' escape route.