Amid Vienna's unrest, Franz accelerates Rudolf's military training. He tasks Grünne to uncover the worker leader. Sisi, unable to shield her son, plans a daring rescue.
Sisi and Rudolf rediscover joy on the island. Franz fights alliances, learning of their location through a spy. Tensions rise as family secrets unfold.
Sisi discovers Rudolf's kidnapping, prompting a desperate rescue mission with Franz. Amid political intrigues, the imperial couple faces dire circumstances.