Every winter, the people of Willow Hollow gather for the annual Winter Festival-but this year, something is different. A lone lantern flickers on the frozen lake, yet no one is carrying it. Legend tells of a traveler who vanished in a snowstorm decades ago, leaving only his lantern behind. When Luna and the Spectral Sprouts investigate, they uncover an eerie connection between the lantern's glow and an ancient mystery buried beneath the ice. Strange whispers follow them, hidden passageways reveal long-lost secrets, and an iron lock-sealed for generations-waits for the right key. As they dig deeper, the Spectral Sprouts realize the traveler's story isn't over... and if they're not careful, they might become part of it. Time is running out. The lantern's flame is fading. Can they uncover the truth before the past traps them forever?