to help chief nurse Ada drive out the Aurora Society for the good of the sanatorium. But as they hatch a daring plan to thwart its next shipment, Baldo and Lau meet their match when a sinister, deadly foe threatens to bring about their end. Meanwhile, under Sebastian's orders, Finny and Snake arrive at the third blood-collection site--F.O.L. Orphanage, where a familiar face awaits them...