Four armed men Mr. Blue, Mr. Green, Mr. Grey, and Mr. Brown get on subway train Pelham 1:23 who dominate the motorman and a novice conductor to get the control of the train. They ask for a ransom of 1 million dollar within one hour for eighteen hostages, otherwise they will shoot those hostages. The kidnapping makes a dispatcher Walter Garber confront with the mastermind behind the crime.