Being an adult is harder than saving the world. Akiko used to do the latter as part of the magical girl squad the Sentinels of Justice. Now she works a boring retail job as Y2K looms, disconnected from her old teammates, her powers, and herself. When she notices her healing magic fading, she knows something is wrong. Then her former teammates are affected too — and then the city's wider population. Akiko and the Sentinels must track down what is happening to magic, and who is behind it, before it is too late.