It's 1665, and the last wave of the plague has left London barren and lifeless. On his last day of life, a young boy snatches an icy heart-shaped bauble from the arms of a dying man. The frozen heart safeguards humanity's last chance for survival, but it also carries a curse. Dodo, the guardian, awakes inside the time-traveling glass cage humbled and ashamed, yet not regretting the deeds that trapped him there. Gaining his freedom would be easy, but what if, in doing so, he must condemn the good Samaritans who helped him? Only Calidora, ruler of time, could save him, the innocents with generous hearts, and the entire human race from the curse of the Shattered Heart.