The Zodiacs, the intelligent, influential children of some of the most powerful and wealthiest lords and ladies in all of London, are invited for the first time in years to the home of business partner and beloved family patriarch, Sir. Quincy Velvatine, for a three month stay to reunite as a whole family and discuss some important...private matters. All seems joyful and full of merriment, until one of the maids come upon the dead body of their master! The authorities are called and an investigation is held, though sadly it reveals nothing about who could've killed Sir. Velvatine. Under the orders of the head officer, everyone in the mansion is forbidden from leaving the city until the murderer is either caught or confesses to their crime. Panic soon stirs and the house's lords and ladies begin to point fingers at each other, leaving the young children to hunt for the culprit themselves. Will they be able to succeed and avenge Sir. Velvatine, or will the killer come for them next?