1916, Calcutta. A man pauses for breath outside the ruins of Jheeter's Gate station knowing he has only hours to live. Pursued by assassins, he must ensure the safety of two newborn twins, before disappearing into the night to meet his fate.

1932. Ben and his friends are due to leave the orphanage which has been their home for sixteen years. Tonight will be the final meeting of their secret club, in the old ruin they christened The Midnight Palace. Then Ben discovers he has a sister - and together they learn the tragic story of their past, as a shadowy figures lures them to a terrifying showdown in the ruins of Jheeter's Gate station.