Twelve-year-old Diana's much-anticipated visit with her best friend, Princess Sakina, turns into an adventure as they face a booby-trapped island, a forbidden visitor, and a demon.

Max's twin is public enemy number one, and it is up to the Midknights to avoid looming dangers like trolls and pirates to find her before time runs out.

Fourteen-year-old Zach learns he has the same special abilities as his father, who was the President's globe-trotting troubleshooter until "the Bads" killed him, and now Zach must decide whether to use his powers in the same way at the risk of his own life.