The disappearance of Lanawyn left Ylanoon broken and unmarked. When the inquisitor's notebook resurfaces, the young elf understands that she can still walk in the footsteps of her mistress. Resuming an unfinished investigation, she embarks on a path that Lanawyn has never finished. When an affluent farmer assures that trolls of ice have decimated her herds, Ylanoon is sent to the North. She gathers a heteroclite company, composed of tracker, archer, dwarf, blue orcs and greens, then takes the sea to the frozen lands. Before boarding, Orshaa gives her a precious notebook, left by Lanawyn. From then, the traque turns from a simple hunt to a quest that obsess her. And a name goes up to the surface: Arkheon...