Henry Jaffa, son of superhero Orangeman and teacher Jenny, has powers—but only sometimes, and never when he really needs them. Hoping he’s not alone, Henry invites other kids like him to Christmas lunch, and the League of Not Really Very Super Heroes is born!

Their first mission? Rescue Prince Derek, who they believe has been replaced by a super-realistic robot. The adult heroes think it’s nonsense, but Henry and his friends know better—teenagers can always spot a fake.

With time running out, the League must find the real prince before the robot embarrasses the Royal Family on live TV and drags Orangeman’s reputation down with it.

But with their unreliable powers, can they pull off the rescue?

And what’s with all the Mars Bars? Everything, as it turns out!