Liam Fitzmorgan has been sent by rebels in Ireland to kill an informer who is a doctor. The doctor has traveled to the United States and Liam has heard he is on the Adams wagon train. Flint finds Liam stranded and dehydrated after his horse was injured. He quickly recovers and is taken in by a group of Irish who are on the train. There is no doctor on the train nor anyone going by the name Liam was given. He quickly becomes attracted to the Irish girl Laura Grady. The train is plagued with a lot of small thefts but no suspect has been found. Laura's dad notices that a black bag of his is missing - a doctor's bag. One of the Irishmen, Carney, is the thief and decides to blackmail Mr. Grady. Liam learns Carney has a black medical bag and confronts him thinking he is the doctor. Carney tells who the read doctor is and Liam confronts Grady but backs off on Laura's word and his love for her. Carney realizes he may be outed and shoots Liam in the back. However, his actions produce a result unintended by Carney.
—Anonymous