Alex is approached by a man who wants to prove that his vault is not impenetrable as it is claimed to be. Alex turns down the offer, but he comes up with a plan which Leonard decides to do while Alex is out of town. The next day, valuable gems which were what he wants taken are reported missing. When the police arrive, Leonrad offers to show where they are. And when they open the vault they find the man dead and the gems which Leonrad left after taking them out of the vault gone. When Alex returns he bails Leonrad out and they go on the run and try to find out what happened.