A previously snagged artefact, Lewis Carroll's Mirror, turns up in a case and Alice is released into the world once more, but, this time, she is hunting something very specific, and will stop at nothing to carry out her goal.

Pete and Myka trace two cases of a strange rusting disease to a factory run by a shady character named Siskel, and uncover links to an explosion at a museum. Meanwhile, Steve and Claudia try to get Steve off the metronome, while Artie deals with Helena, Leena, and Mrs. Frederic about the astrolabe and Brother Adrian.