An outlaw named Duane ( Tom Mix ), captured by the Texas Rangers, is promised a pardon if he rounds up a gang of cattle thieves. The man he suspects as the leader is revealed to be the father of Duane's sweetheart, Helen ( Billie Dove ). Duane captures the gang, gets a pardon for Helen's father, and marries Helen.
True Blue begins with the marriage of black-sheep British nobleman Gilbert Brockhurst to the daughter of a Western rancher. When he learns that he has inherited his father's title and estate, Brockhurst deserts his wife and young son Bob. Upon attaining adulthood, Bob becomes the boss of his grandfather's ranch.
In Bagdad, Princess Badr al-Budur, the daughter of the Sultan, falls in love with Aladdin, the son of a poor tailor, and rejects the suit of evil alchemist al-Talib, her father's choice. Al-Talib consults his Evil Spirit, who advises him to find the magic lamp hidden in an underground cave. Unable to get it himself, al-Talib hires Aladdin, who secures the lamp but keeps it when he realizes al-Talib's wickedness. With wealth obtained through wishes, Aladdin courts the princess. After the lamp changes hands between al-Talib and Aladdin, al-Talib steals it and abducts the princess to the desert. Aladdin follows with only a gourd of water. Suffering from thirst and exhaustion, Aladdin nearly succumbs, but the horsemen of the Sultan, who learned of his daughter's abduction, ride up and rescue Aladdin.
A young woman and her five little brothers and sisters are left orphans by the murder of their father over gold found on his ranch. Together the seven offspring fight against their greedy neighbors to keep what is rightfully theirs.
Family relationships of a New Mexico family are just one part of this silent cowboy western about a war veteran who finds a goldmine. He wants to earn enough money to take care of his young son, but crooked officials swindle him out of the mine, and then his son is killed. He swears vengeance and joins up with Mexican bandit, "Pancho Zapilla", who intends to destroy his whole town.
Karl Heinrich is the heir to the throne of the small European principality of Rutania, but he's a lonely child, not allowed to play with other children and knowing little about life outside the castle. When he reaches maturity, he is sent to attend the University of Heidelberg, and finds fellowshi with classmates and a blossoming love with Katie Ruder, his only friend during childhood and the niece of an innkeeper. However, political turmoil in Rutania forces him to return. War is declared. Heinrich returns to Heidelberg one last time to bid a somber farewell to his beloved Katie.