Who Is the Seventh?. Who Is the Seventh?, #1

In a sprawling, opulent mansion shrouded in secrecy, an anonymous phone call shatters the silence, delivering a chilling prophecy: in seven days, at seven o'clock, the seventh member of the household will be murdered. The warning is dismissed as a cruel prank, a repeat of a tragic history the powerful family would rather forget. But as the fateful date draws near, a team of investigators uncovers a web of old grudges, hidden identities, and long-buried crimes.
With a madman roaming the halls and daggers mysteriously vanishing from a locked collection, they must race against time to unravel a decades-old mystery. In a house where every relative is a suspect and the past refuses to stay buried, the desperate question remains: who is the seventh?