The soldier in the spinal carriage can neither move nor speak. Who is he? His fellow wounded and officers are intent on finding out.

Based on Robert Louis Stevenson's novel.

Two couples betray the decadence which lurks beneath the surface of high society: Steve, wealthy but ignorant, is engaged in a kinky relationship with Helen, a posh socialite living in Belgravia; meanwhile, Steve's nouveau riche wife Sybil is having an affair with Les, a private eye hired to kill her husband.