When the Blackout Calls My Name

Mara Venn saves a dying stranger who whispers the nickname only her dead sister knew—then slips a burning black shard into her palm. When the blackout hits, sealed doors across the city unlock one by one. The man, Kieran Rook, is a hunted runaway from the Lumen Registry. Mara's blood is the key to the city's buried truth. To survive seven days, they sign a forced life bond: she protects him, but he may have killed her sister. When every screen lights up and his former mentor brands Kieran a murderer, Mara realizes her missing sister Elise left one final secret—one that leads straight to the deepest sealed door.