A pirate's home is the sea, sailing beyond the horizon with her true love. Aboard the , Captain Cinder finally has the life she's always dreamed of. Her freedom is restored, her crew is a trustworthy bunch, and the princess who holds her heart is by her side. But trouble brewing back in Redmere threatens to pull Cinder and Princess Georgina apart before their future can truly begin. Georgina feels a responsibility to help, while Cinder is vehemently against returning to their former home. Instead, she embarks on a dangerous treasure hunt that could cost her everything. Hiding a deadly threat from those she holds dear, Cinder pushes everyone around her away just when she needs them the most. Friendships are tested. Risky alliances forged. Yet as storm clouds darken Cinder's future, one thing becomes painfully clear: Her home is taking on water, and time to save the people she loves is running out. Crimson Siren.