Amidst spectral hauntings, two boys unravel the mystery of a ghostly forest and a vanished school bus at Camp Blackwood. Confronting eerie apparitions and time-warped trials, they confront the past's deepest secrets. Meanwhile, survivors Jax, Elara, Arin, Maia, and their Saint Bernard, Jake, find unity in a treacherous, post-apocalyptic world. Seeking a new beginning in nature-reclaimed cities and ancient caverns, the group encounters hardship and unexpected kindness. Bound by loyalty and love, they find strength and hope in the face of a frozen, changing earth.