While Toki and Abigail remain in the clutches of Magnus Hammersmith and the Metal Masked Assassin, the remaining members of Dethklok carry on with their lives while pretending not to care. But as their guilt mounts and their fans become increasingly restless with Toki's absence, they realize that they must find a way to rescue their brother.

After the heroic rescue of Toki Wartooth, DETHKLOK frontman Nathan Explosion finds himself traumatized in a BRUTAL professional and romantic flat-spin all while he is tasked with fulfilling the prophecy and confronting the ultimate songwriting challenge: write the SONG OF SALVATION and save the planet. Can Nathan Explosion look beyond his brutally damaged ego to save his band, stop the Metalocalypse, and finally face the ultimate evil: Salacia?