After finding an odd envelope, Policeman Ming-han's life takes a spooky turn: He's now wed to a ghost husband, and they must solve a crime together.
College freshman Si-ying gets a part-time job at “Cafe. Waiting. Love” coffee shop, where she befriends Abusi, a tomboyish barista who can make any coffee the customers request, the beautiful and mysterious cafe owner, and Zeyu, the boy who always sits in the same spot in the cafe who seems to be very popular with girls and on whom Si-ying develops an instant crush.
Facing a trail of murders staged as chilling word games, a rookie police captain and a goofy detective race to solve a serial killer's deadly puzzles.
