The tusk from a mammoth and a whale skeleton are found in a grotesque mix of bricks and destruction - a zoological museum has been blown up. Images of the bisected building with all the scattered remains of stuffed animals are broadcast worldwide along with the statement sent out by the underground group of artists who claim responsibility: "This is not entertainment. It is not a political statement. It is not even news... This is art!"
When an evil spirit known as Pitch lays down the gauntlet to take over the world, the immortal Guardians must join forces for the first time to protect the hopes, beliefs and imagination of children all over the world.
A decade after his heroic defeat of the monstrous Kraken, Perseus-the demigod son of Zeus-is attempting to live a quieter life as a village fisherman and the sole parent to his 10-year old son, Helius.