After diamond power promises to replace steam, an unemployed labourer and a thieving noble unite to foil an international plot and avert a war.

Alf Wilson resents the new technology that cost him his factory job, especially as his clockwork leg bars him from army enrolment. He daren’t confess his unemployment to his overbearing mother. Desperate over the rent, he ends up in a detention cell with a hangover.

Impoverished Lord Richard Hayes maintains his expensive parliamentary seat by a mixture of charm and burglary. During a poorly planned break-in, he inadvertently witnesses a kidnapping. To cap it all, the police arrest him for the crime. At least he’s using a fake identity. The real criminals make off with not just the professor who discovered diamond power, but her plans for a diamond-fuelled bomb.

When Rich encounters Alf in the neighbouring cell, he sees an opportunity to keep his noble reputation intact. He persuades Alf he’s a secret agent who needs an assistant. This chance association will take them to the oddest locations. But law-abiding Alf’s first assignment? Break Rich out of jail.