Nico, Opal, Tyler, Emma and Logan survived their worst fears come to life and saved their town from a monstrous figment invasion. Now they want to keep their heads down, enjoy Halloween and explore the secrets of their mysterious houseboat clubhouse. And also figure out their new Torchbearer responsibilities as keepers of the Darkdeep, an ancient whirlpool hidden in Still Cove that can make both dreams and nightmares into reality. But when a dangerous new breed of figments start appearing on their own, and the very environment around them begins to spiral out of control, the friends realise they have no idea what they are doing – or how they're supposed to restrain the Darkdeep ...