After thirteen-year-old Hattie Oh casts a dangerous spell so her adopted sister, Riley, will get a share of her inherited magic, Riley must undertake a near-impossible quest to save Hattie from death.--

Thirteen year-old Riley was not born to be a leader, but the magical community thinks she and her adopted brother, Dahl, are meant to lead the world into the Age of the Final Eclipse, so now the one thing Riley must do is believe in herself.

When Toru Kamiya is pushed into falsely confessing his love to Maori Hino, she tells him she'll date him on three conditions. 1) Don't talk to her until after school. 2) Keep any communication between them concise. 3) Don't really fall in love. Unfortunately, he isn't able to keep the last rule—and when he tells her how he feels, she reveals that she has an illness that prevents her from remembering anything that happened the previous day, and...