"Offshore" is a novel that revolves around a group of eccentrics who live on houseboats on the Thames River in London. The story is set in the 1960s and focuses on the daily lives and struggles of these unconventional characters, including a divorced mother of two, a marine painter, a male prostitute, and a retired navy man. The narrative explores themes of community, isolation, and the struggle to maintain a sense of stability in a constantly changing environment.