Synopsis

Based on “Mercator Knight” from Mercator’s Hunting of Evil by Yutaka Maya.
 
A high-profile female novelist approaches the notorious eccentric detective Mercator Ayu with a chilling request: “I may be the target of a murder plot.” Each day, mysterious playing cards arrive, hinting at a sinister “countdown to murder.” What do these cryptic cards signify…? Detective Mercator and his assistant Minagi Sanjo combine their sharp deductive skills to unravel the truth behind the escalating threat.