A beetle is possessed by the soul of an ancient Egyptian princess, who is determined to get her revenge on a member of the British Parliament.

Somewhere in Europe, a scientific research institute, houses the lair of one of the leaders of a terrorist organization called The Black Hand. Zhan Raur, who is suffering from a delirium of power and also from a heart condition, awaits the visit of an unknown correspondent carrying precious documents. But the F.B.I. He has been replaced by one of his agents, Thomas Asher, who is responsible for unlocking the secrets and ramifications of The Black Hand.

An aristocratic woman, Lady Isabel, leaves her husband and children when she suspects him of adultery, a notion which had been suggested to her by the scheming and murderous Captain Levison. Life on the continent with Levison does not work out as she had envisaged so, eight years later, she returns to England and finds her husband has remarried. She cannot bear to be away from her family and so dons a disguise, gaining employment with them as a governess. When her young son, Willie, dies she is unable to comfort him as she would like, and she too dies.

Demobilized soldier Phil Moran joins a boxing troupe, wins fame as a champion, and ultimately wins the heart of Kitty, the daughter of his boss, while thwarting the advances of a wealthy, unscrupulous admirer, Ireton, who also has designs on Sir Rufus Douglas's daughter, Hilda.