Nico, Opal, Tyler, Emma, and Logan—now Torchbearers—are tasked with guarding the Darkdeep, an eerie whirlpool hidden in their town of Still Cove that turns dreams and nightmares into reality. As they attempt to unwind and enjoy Halloween at their houseboat clubhouse, a new threat emerges: figments—creatures born of nightmares—begin to surface on their own. The group must confront these escalating dangers even though they’re unsure how to control or contain the Darkdeep.