A story for young moderns describing the escapades of four young people in and about London. There are lively incidents at the Caledonian Market; a stolen aeroplane flight that ends somewhat disastrously; attempts at self-expression at the "Credo Club"—the haunt of young people with convictions and dabblers in the Arts; a romantic fantasy of the Tower of London; and a riotous Scavenger Hunt wherein risks are run, odd characters are encountered, and a dramatic discovery is made.