The Viking village of Berk faces constant attacks from dragons, causing chaos and endangering the villagers. The young and seemingly weak Hiccup, son of the village leader Stoick the Vast, yearns to prove himself in battle.
During a dragon raid, Hiccup manages to shoot down a rare Night Fury with a bolas launcher. Despite his victory, no one believes his accomplishment. In the forest, he encounters the injured dragon but chooses compassion over violence, setting him free.
Stoick, preparing for a major dragon hunt, enrolls Hiccup in a dragon-fighting class along with his peers. Despite facing difficulties, Hiccup reconnects with the Night Fury, now named Toothless, and builds a bond that leads to remarkable discoveries about dragons.
As Hiccup learns more about dragon behavior, a startling truth emerges: dragons attack Berk out of necessity, not malice. With his newfound knowledge, he confronts difficult decisions that challenge his relationships and convictions.
In a final exam that will test his beliefs, Hiccup faces a daunting challenge to prove that dragons and humans can coexist peacefully. With the support of his friends and Toothless, he embarks on a daring mission to save Berk from a formidable foe.
Through courage, sacrifice, and unity, Hiccup and his companions overcome the greatest threat Berk has ever faced. The village witnesses a transformation as humans and dragons forge a peaceful coexistence, marking the beginning of a new chapter in their history.