Following Seraphine's cryptic clues, Amara and Rowan discover an ancient artifact hidden deep in the library's archives: the Mirrorblade, a weapon forged to sever the connection between the two realms. The blade, however, is shattered, its fragments scattered across the campus.

With the silver key Seraphine gave her, Amara begins to unlock hidden paths and uncover the shards. Each recovery is more perilous than the last, as shadow creatures emerge to stop her, their forms shifting and unpredictable.

As she pieces the blade back together, Amara learns the truth: the Mirrorblade is not just a weapon; it is a conduit of power, one that requires her to confront her deepest fears and darkest truths to wield.