Drummers of the Dead: The First Death: Chapter 1, The Sound of Forgetting

Onitsha, United Nations of West Africa, 2187 CE. The Ancestors' Voice network spans the continent, a web of sacred drums that store and transmit the Chi of the dead, preserving their memories and knowledge across generations. In this world, death is a transition and memory a currency. Ada Okoro reads the memories of the dead through these sacred igba drums. She connects with their chi, and witnesses what they witnessed. It pays the bills. It keeps her numb...
Until Chiamaka walks through her door. An aristocrat woman who stabbed her sister seventeen times and can't remember a single one. The authorities and the network can't seem to agree, strange. Even stranger, Chiamaka says she's innocent. Ada doesn't care either way, until she reads Chiamaka's Chi and finds things that shouldn't exist. Voids where memory should be...and inside, something sinister looking back. A secret. powerful enough to shatter the network itself.