Danger Mouse hunts for Baron von Greenback. He is nowhere to be found, but then what is this? The baron pops up on Penfold's favourite TV game show Who Wants to Marry a Queen. Danger Mouse is tasked with escorting the Queen of Goldlandia on her official visit to London with her new husband, the Baron. Colonel K orders DM to serve and protect the new King Greenback! Subjected to humiliation after humiliation at the hands of his former nemesis, DM takes his eye off the ball and the queen is kidnapped along with the baron's daughter Delilah. Both he and the baron naturally blame one another. An urgent call for help from Delilah leads to the baron and DM racing into a trap. Delilah has kidnapped the queen and now has both her father AND Danger Mouse on a sinking Toadlantis. Can DM thwart Delilah's thirst for power as she tries to crown herself the new Queen of Goldlandia?