Centuries ago, humans and dragons lived in perfect harmony. Nowadays, with the unstoppable humans closing in on the last dragon refuge, a small community of the remaining mythical creatures has no other choice but to fight. As a result, to prove his worth and avert extinction, Firedrake, a silver-hued, one-of-a-kind young dragon, embarks on a perilous quest to the edge of the world, along with feisty brownie Sorrell, to find the Rim of Heaven: a hidden, colourful haven for dragons protected by powerful magic. En route, they pick up orphaned Ben, who claims to be an experienced dragon rider, and off they go to far-off, snow-capped Himalayas. However, not far behind them is monstrous Nettlebrand, an invincible, artificial dragon slayer, bent on stopping them. Do they stand a chance of saving the last dragons?