- Release: January 3, 2019 (Australia)
- Country: United States
- Director: Dean DeBlois
- Producer: Brad Lewis, Bonnie Arnold
- Cast: Jay Baruchel, Kit Harington, American Ferrera, Justin Rupple, Cate Blanchett, Kristen Wiig, Craig Ferguson.
- Music: John Powell
- Distributor: Universal Image.
While shortly after the last installment of the film, the storyline found Hiccup (Jay Baruchel) after taking over the title of the deceased chief discussed Stoick (Gerard Butler), Hiccup managed to follow up on the dream of fish to see horses and dragons that could be seen in harmony.
Working together with his goals, the resilient and persistent Astrid (Ferrera), his mother who has recently been rediscovered named Valka (Cate Blanchett) and other colleagues, Hiccup and friends who are looking for the help of dragons who had been locked up and brought them back to Berk Island.
However, this is a very important place for the criminals Grimmel (F. Murray Abraham) who really want their utopian paradise. When the villagers and their dragons make a hasty retreat to be able to find a world that was previously merely thinking, toothless find themselves as disturbed by White Lioness known as Light Fury. Their ties eventually filled with self-doubt, to regain the realization of the relationship with Toothless.