Ten-year old Agathe-Christine, or simply AC, prefers to be on her own. AC fancy mysteries, and from the basement in the building, where she has just moved in, she has established a small detective bureau. AC´s first mystery appears to be simple to solve, but before long AC finds herself involved in a much more complicated affair, than she could have ever foreseen.
| Actor | Role |
|---|---|
| SSimone Edemann MøgelbjergAC (voice) | AC (voice) |
 Anne-Grethe Bjarup RiisAC's mother (voice) | AC's mother (voice) |
| MMette Kristine SlothSanne (voice) | Sanne (voice) |
| OOliver BøtcherVincent (voice) | Vincent (voice) |
 Søs Egelind(voice) | (voice) |
 Tommy Kenter(voice) | (voice) |