The teens of Berk find a mysterious girl named Heather on Thor's Beach. While Hiccup and the other teens openly welcome the newcomer, Astrid's jealousy turns to suspicion when she notices Heather is taking an unusual interest in the Book of Dragons.
Elenco:
Jay Baruchel
,
America Ferrera
,
Christopher Mintz-Plasse
,
T.J. Miller
,
Zack Pearlman
.