The culture festival draws to a close as Persona 4's Investigation Team and Persona 3's Specialized Extracurricular Execution Squad make their way to their final labyrinth. But when the final F.O.E. is none other than Rei's shadow, Zen reveals the truth behind his and Rei's mysterious pasts--and what led to the creation of the labyrinths. And as a swarm of shadows attacks Rei and traps her inside the clock tower, it's up to the two groups to go on one final mission to save their friend and find their way back home!