London, 1889. Claire Trevelyan 17 should be a lady, but prefers to invent explosive devices. When her father Viscount St Ives loses the estate, a new leader rises in London underworld, the Lady of Devices. She wants to work in the lab of Andrew Malvern, member of the Royal Society of Engineers. Her devices may help realize their dreams, if they can stay alive long enough. But Andrew's funder, pal Lord James Selwyn, is attracted to the Lady himself
