A dashing, cavalier highwayman worked his way from the French provinces to the roads around Paris, preferentially robbing jewelry from aristocratic ladies,who treasure the yellow scarf he leaves as as souvenir. D'Artagnan nearly catches him, but lets him go to 'save' a victim dangling from a carriage. A baby boy is anonymously delivered in a basket with a note begging D'Atagnan to take good care of it. Although he assures it can't be his, he quickly turns paternal. When the captain outsmarts the mates' attempts to hide the kid, he orders it brought to a nuns orphanage, but D'Artagnan decides to resign his musketeer commission instead, knowing how he missed his absentee father. However the queen insists to have D'Artagnan in the lead of a trap she sets for the highwayman in the palace and the boy is kidnapped while the captain babysits him, with surprising consequences.