Just days after an astonishing ascent to Grandmaster Alchemist, Ruwen finds himself embroiled in a contest of mythical proportions. Invited by the enigmatic Nine Muses, Ruwen and a cohort of alchemists from the Black Pyramid journey to a mysterious location where the boundaries between the Shadow Realm and the Material Realm dangerously blur.

As the competition unfolds, Ruwen suspects that the Muses' quests harbor darker undertones. With each task designed to delve deeper into the forbidden, Ruwen fears the Muses have unearthed a secret in the Shadow Realm—one that threatens to unravel the very fabric of the universe.Guiding his friends and fellow alchemists, Ruwen must navigate through this treacherous contest while honing skills long neglected. As the true nature of the Muses' pact with the shadows emerges, Ruwen faces a race against time to unravel the mysteries of the Shadow Realm and prevent a cataclysm that could annihilate all he holds dear.

In "The Tenth Muse," secret alliances are revealed, ancient secrets are unearthed, and the barrier between realms blurs. In the flickering shadows of otherworldly pacts Ruwen must outwit the Muses and save the universe, or risk becoming the final note in their perilous symphony.