In the decaying metropolis of Detrot, 60 years and one war after Luna's return, Detective Hard Boiled and friends must solve the mystery behind a unicorn's death in a film noir-inspired tale of ponies, hard cider, conspiracy, and murder.
Twilight Sparkle is called away to tend to Luna when she falls ill. As Luna grows sicker and Twilight more determined to help the younger princess, she begins to uncover dark secrets about the elements, the alicorns, and her own past.