Tristan, Sarah, and Esteban, the NIGHTMARE BRIGADE, return! Tristan's mom, Alice, invented an incredible machine that allows them to enter a person's memories and help them. When a classmate, Sofiane's, memories of a pack of primates disturb him, it's up to the NIGHTMARE BRIGADE to investigate. But where - and why - did Sofiane encounter these apes? Plus: Alice is developing problems with her own memories! And when a new woman arrives at the clinic, with memories of a town afraid of the night, can the Brigade survive and help everyone?