Sir Hallam finds himself at the centre of a national crisis when his friend, the Duke of Kent, asks for help. Meanwhile, storm clouds are gathering within 165 Eaton Place, with Lady Agnes's growing fear over the imminent arrival of her baby, and the servants' concern for Lotte, who refuses to speak. But, as the king finally abdicates, Hallam makes a discovery that will change his life forever.

The Bank of Karabraxos is the deadliest bank in the cosmos - only a fool or genius would tempt to rob it. Fortunately, for The Doctor, he's both. But nothing even The Doctor has encountered can prepare them for the Teller: a creature of terrifying power that can detect guilt.