The Cisco Kid, a good-natured, womanizing bandit, is traveling in Arizona when he and his sidekick Gordito see a gang attack a lone man driving a wagon. They chase away the gang, then stop the wagon's runaway horses. The gang's leader, Jim Harbison, doubles back and pretends to be a passerby, although Cisco is not fooled by his pretense of innocence. The men discover that the driver was traveling with his infant son, and the injured man begs Cisco and Harbison to care for the child in exchange for shares in his gold mine. After dividing the map to the mine in three equal pieces between Cisco, Gordito and Harbison, the man dies. Harbison's men then attempt to kill Gordito and Cisco. Much to Harbison's chagrin, the two bandits have already memorized and destroyed their pieces of the map, and so the group leaves for town to discuss their partnership. On the way, Cisco realizes that they have forgotten the baby, whom he calls Junior, but Junior has been found by schoolteacher Julie Lawson as her stagecoach passes by on the way to town. Cisco is charmed by Julie's beauty, but she is cold to him because of his careless treatment of Junior. When the men reach town, they go to a saloon run by Harbison's partner Teasdale. While Gordito tends to Junior, Cisco becomes enamoured of Harbison's girl friend, dancer Billie Graham. Cisco suspects a trap when Harbison arranges to meet him later to search for the mine, and Cisco therefore asks Julie to look after Junior. While Julie is arguing with her newly arrived fiancé, Tommy Bates, who mistakenly thinks that Junior is her baby, Cisco and Gordito trick Harbison into revealing that he has indeed tried to ambush them. The two bandits return to the saloon, where Cisco gets into an altercation with a drunken Tommy over Julie. Realizing that Julie belongs with Tommy, Cisco turns his romantic attentions to Billie, who reveals that she knows his true identity but will not turn him in. The couple have a falling out when Billie suspects Cisco of stealing Harbison's piece of the map, which she stole from Harbison, and Cisco, Gordito and Tommy wind up in jail after Billie reveals their identities. Later that night, Cisco instructs Harbison to rob a stagecoach while dressed as the Cisco Kid so that Cisco himself will be cleared of suspicion and freed. After Harbison leaves, Cisco and Gordito break out of jail and kidnap the local justice of the peace, Pop Saunders. They take him to Julie's house, where they force him to perform a wedding ceremony for Julie and Tommy. While soldiers search for Harbison, whom they now think is the Cisco Kid, Cisco and Gordito show Tommy the gold mine, which they bequeath to him, Julie and Junior. The soldiers shoot and kill Harbison, thereby freeing Cisco to go on his way. Billie, who has cleared up her misunderstandings with Cisco, accompanies him and Gordito as they leave town, and Cisco promises to find her a fine husband.