From the publisher
Snow in the summer?!! Eric, Neal, and Julie are headed back to Droon to fix the mess they made with the Wand of Urik. Even though it's summertime back home, the gang's new adventures get them all snowy in the Ice Hills of Droon. In a hidden castle there, they must wake Droon's last hope against evil Lord Sparr... the famous Knights of Silversnow.