In Allison and the Never-Ending Closet, five-year-old Allison discovers a magical portal hidden in the corner of her bedroom closet. Stepping through, she enters the enchanting Closet Kingdom - a world filled with shimmering trees, candy-colored rivers, and delightful talking creatures. Welcomed as the long-awaited Princess, Allison is guided by a sparkly-winged advisor named Tilly and quickly becomes a beloved ruler, spreading joy and kindness throughout the land.

But when a mysterious fog threatens to steal the kingdom's colors, Allison embarks on a brave quest to restore the magic. Alongside Tilly, she journeys through whimsical landscapes, faces silly but tricky challenges, and uncovers the source of the gloom - a lonely troll named Grumble who's lost his laughter.