The young nobleman Inge is riding through Sweden, looking for his twin brother, Arild. He meets a group of gypsies who welcome him. They met Arild earlier and believe that the brother is Arild. Inge falls in love with the mysterious girl Isis.
When the old University Professor discovers that some of his pupils often sneak into a speakeasy, The Blue Angel, to visit a dancer, Lola, he comes there to confront them. But instead he is attracted to Lola. He returns the next night to The Blue Angel to spend time with Lola and stays overnight....
