The sabotage of multiple military installations leads The Bishop to contact Unwin. Tracking down Brother Gregory, a vicar involved in a car accident near the site of the latest attack, Unwin helps Harding to slip into Brother Thomas' briefcase. Arriving at Pennydridge Seminary, Harding discovers that the vicars are in fact mercenaries who answer to their own Archdeacon.

Unwin and Harding are assigned to guard the King of Muldovia, who is in London to sign an oil rights treaty. The Muldovian Prince plots to overthrow the King, but his hitman's assassination attempt on the monarch is thwarted. The Prince instead conceals a bomb inside a toy bear intended for the King's son.

Lord and Lady Hazlewell and their associate, Spiker, greet ex-convict Mullins at their manor. The deceased Lord Hazlewell Senior bequeathed one of two plates previously used to print counterfeit dollar bills; the second is revealed to be hidden at Greenacre Farm. Unwin and Harding join the race to be the first to reach the prize.