Unscrupulous gambler and drug addict Dunstan Leech has embezzled money entrusted to him. Hoping to cover the theft he plans to wed his mother’s ward Kate Heathcote, who is tutor to his disabled brother Cecil, only to discover she loves Richard Blunt. Unhinged, due to his drug use, he poisons his brother’s food to clear the way to an inheritance while his equally dishonest mother Mrs. Jelf attempts to frame Blunt for theft. That plan fails and Kate & Richard marry departing for the diamond mines of South Africa. Obsessed, Leech follows and kidnaps Kate and the couple’s child fleeing back to England pursued by Richard. Held hostage at Leech’s estate, his dying mother gives Kate the evidence to prove Dunstan’s culpability in Cecil’s slaying but driven mad with guilt and haunted by Cecil’s spirit he commits suicide, and the young family are reunited.

In 64 A.D., Marcus Superbus is Prefect of Rome. When the Emperor Nero decides to renew persecution of the Christians, Marcus opposes him, fearing for the safety of Mercia, the Christian woman whom he loves. Through the machinations of the Empress Poppaea and other women at court, Tigellinus, Nero's agent in the war against the Christians, convinces Nero to have Mercia arrested. Marcus appeals to the emperor for mercy, but is told that she can be saved only by renouncing Christianity. Waiting to enter the arena to be killed, Mercia steadfastly refuses to reject her religion, despite Marcus' pleas. Finally, Marcus is converted by her and they enter the arena to face death together.

A British army officer refuses to avenge the death of a general who was murdered years earlier. He is awarded three feathers by his officers. When his fiancée fails to defend his stance, he plucks a feather from her fan. He proves his courage by rescuing his comrades in dangerous and life-threatening situations. Later he returns each feather as proof of his redemption and courage.