In a world where power is forged through binding contracts, Treyus has always lived a quiet, uncontracted life—until the day his sister, Syla, is taken. With the authorities not making a move and no leads to follow, Treyus makes a desperate choice: he strikes a dangerous pact with a Demus, a creature of immense power and even darker whispers. With every step closer to saving Syla, and learning that power is currency, Treyus must decide, will he control his power or will it consume him?