The United States is experiencing a wave of terrorist attacks - bombs of unprecedented power regularly explode in American cities. The President is shot while he is giving a speech about fighting back against terrorists, but he miraculously manages to survive. He is taken to the hospital for emergency surgery. At this time, an experiment on selective memory erasure is being conducted at the hospital; an electromagnetic pulse created by a bomb that destroyed the White House shortly after the assassination attempt on the president interferes with the experiment, after which very strange things begin to happen in the hospital...