The mysterious air pirate Filibus steals from the rich and then retreats to the safety of her airship, which is manned by a staff of mask-wearing lackeys who instantly obey her every command. When an esteemed detective sets out to investigate the thefts, Filibus attempts to frame him as the burglar, while also slipping between male and female disguises to romance the detective's sister.

Crime drama about a betrayal, murder and jealousy around a femme fatal.