Taking a break from her job at Enchantments, Stony Mill's finest mystical antique shop, Maggie O'Neill visits a carnival where she senses some bad spirits. And when a construction worker is suspected of killing a young woman, it's up to Maggie and the N.I.G.H.T.S. ghosthunting team to uncover the dark spiritual energy leaking into their town before it spoils everyone's fun.