Liz Kross descends the staircases at Charing Cross tube station, shedding her clothes as she goes and ending up nude on the platform where a bystander saves her from stepping in front of a train. She is arrested and referred to Dr Corder who discovers that she is working as a waitress and a stripper to finance an operation for her father, a fact which he resents and has caused her to subconsciously rebel.