Louis Hartmann loses his father, a private detective investigating a string of murders, leaving him all alone. Rumor has it that the murders are the work of a Grave-Digger Vampire. Louis isn’t keen on superstitions and vows to catch the culprit himself. That is, until a self-proclaimed detective, Arne Neuntöte, and his assistant, Lynn Reinweiß, appear. A new door is about to open for Louis…
Cast: Mariya Ise, Koki Uchiyama, Aimi Tanaka
Season 1
12 episodes
1. Those Who Dig Pits for Others Will Fall In ThemselvesLouis Hartmann joins forces with the members of the Arne Detective Agency to investigate his father's murder.14CC23minJan 7, 2026
2. There Is Always Sunshine After the RainLynn remembers the time she first met Arne and hired him to help investigate her father's suspicious behavior.14CC22minJan 14, 2026
3. Misfortune Never Visits AloneArne makes a shocking discovery about Lynn's father and Gordon reveals the dark truth of the Reinweiß mansion.14CC23minJan 21, 2026
4. Those Who Never Gamble Never WinLynn and Arne are both troubled by surprise encounters that threaten to alter the course of the investigation.14CC22minJan 28, 2026
5. One Swallow Does Not a Summer Make!Lynn and Arne assemble the servants to review the clues and sniff out the killers through deductive reasoning.14CC22minFeb 4, 2026
6. Time Will TellA distraught mermaid arrives at the detective agency searching for the reason why her lover tried to kill her.14CC22minFeb 11, 2026
7. Eating Whets the AppetiteArne tracks down a jewel thief while Lynn investigates a series of disappearances connected to an art museum.14CC22minFeb 18, 2026
8. Desire and Love Make All Burdens LighterLynn and Arne trace the mysteries of the missing men and lost piece of jewelry to their shocking conclusions.14CC22minFeb 25, 2026
9. Not All That Glitters Is GoldArne and Lynn are asked to investigate a man who appears to have started cheating on his wife after an injury.14CC22minMar 4, 2026
10. Different Countries, Different CustomsArne decides to investigate a locked-room murder on a whim and soon realizes that it may not be what it seems.14CC22minMar 11, 2026
11. Birds of a Feather Flock TogetherArne uncovers a disturbing connection between all five of the cases investigated by the Arne Detective Agency.14CC22minMar 18, 2026
12. All's Well That Ends WellLynn and friends battle their way through Dracula's soldiers as they race to rescue Arne before it's too late.14CC22minMar 25, 2026
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Louis Hartmann loses his father, a private detective investigating a string of murders, leaving him all alone. Rumor has it that the murders are the work of a Grave-Digger Vampire. Louis isn’t keen on superstitions and vows to catch the culprit himself. That is, until a self-proclaimed detective, Arne Neuntöte, and his assistant, Lynn Reinweiß, appear. A new door is about to open for Louis…
Creators and cast
- Created by
- Mayo Arita, Ayaka Sugiura, Yuito Hirahara, Emi Kashimura
- Studio
- SILVER LINK., Asmik Ace, Nippon Television Network Corporation
