Calcutta 1837. Young officer William Avery is tasked by his employers-the East India Company-with tracking down disgraced poet and spy Xavier Mountstuart, lost in the jungles of central India. Accompanied by the dissolute and mysterious Jeremiah Blake, Avery is sure the mission is doomed. When their search leads them into Kali-worshipping Thug territory, the pair are soon fighting for their lives, but impelled to solve the horrifying mystery behind their mission. With death and danger on every side, is it too late for them to save themselves?