You are on your way to meet your wife and children, traveling by tube from St. Pancreas to Notting Hill, when the train grinds to an abrupt halt in a tunnel. The lights go out and you are in complete darkness. After a few moments the emergency lights come on and after a long 5 minutes with no information the driver announces you must all get of the train. The driver has lost contact with control. Everyone files out through the cab and walks along the track to Russell square. The station is packed with people. Everyone is panicking. Outside there has been a chemical attack! More and more people are pouring into the underground. Can you find your family and escape from London?