The mystery behind the Aguinas family and their potion stockpile deepens following the mission to rescue Dr. Nierenberg s daughter from Robert s blackmail attempt. But his escape complicates matters, drawing Mariela that much closer to the royal family and the prying eyes she d so desperately worked to avoid. With potions running low and a seemingly endless labyrinth still before them- how much longer can Mariela keep her alchemical abilities secret...?