Mister is tired of mercenary life. Luckily, as thanks for rescuing her daughter, Queen Star has invited him to join the Star Planet as an honourary Dronewatoner. But on his way to the ceremony, Mister is abducted by the cruel Flames, who seek to claim Mister's sonar power for their own. When Mister fails to meet his guide at the rendezvous point, the Star Planet knows something has gone horribly wrong. Queen Star, her Captain of the Guard, a skilled tracker, and a mighty warrior team up to rescue Mister before it's too late. But the Flames have plans that the Star Peoples don't know about-ones that could endanger the entire planet...