With a mysterious key in hand, and their only friends by their side, the twins Malwynn and Umaryn race against the Amaranth Empire's Invasion. Chased from the capital city of Varrland, branded as criminals for the murder of their traitorous aunt, they begin the trek to the forlorn wilderness of Duulan. They seek a village where their parents had nearly perished decades ago, where an abandoned mine, protected by an army of the dead, conceals the darkest secrets of Elmoryn. Can the twins unveil the secret that hundreds died for before the Purple Queen's army overruns Ockham's Fringe? Will it even matter once they discover what lies beneath the earth of Duulan? Conspiracies older than memory are dug up and revealed, the echoes of sins long hidden in the darkest recesses of time. The worst may be yet to come. The Echoes of Sin is the third and final installment of Elmoryn's The Kinless Trilogy, a dark and wonderful exploration of dark fantasy and steampunk.