Mercedes is just trying to make her way through life: taking classes, working her shift as a Kaffeteria barista, and writing short stories that she never seems to finish. A minor accident imbues her with startling powers she can't control. She can project future events and rewrite the past but with disastrous consequences.

Stricken by a regular customer's misery, Mercedes uses her Lady Blackwing superpowers and conjures up a remedy. It backfires horribly and unleashes a terrifying specter. If Mercedes can't figure out how to undo it, Antoinette will be forever doomed.