The Last Codicil

When Edwin Halcroft dies in the gloom of Halcroft Manor, he leaves his family a final, twisted gift: a codicil that turns his massive inheritance into a psychological trap. His heirs—the sharp-edged Clara, the debt-drowning Julian, and the icy, poised Vivian—expect a simple payout, but they instead find themselves ensnared in a "locked-room" mystery after the document vanishes from a sealed safe. Detective Lila Mercer, brought in to oversee the estate, soon discovers that the manor itself is a maze of hidden passages designed by Edwin to observe his family’s moral rot. As Lila uncovers Vivian’s history of illegal asset-shuffling and Julian’s desperate financial holes, she realizes the missing document wasn't stolen for profit but moved to delay a reckoning. Ultimately, Edwin’s final game isn't a quest for revenge but a forced correction; by exposing the family's secrets through the very architecture of their home, he ensures that the Halcroft legacy can only continue once the truth is finally, painfully told.