Mad About Men

When gymnastics school teacher Caroline goes on holiday at her family's home in Cornwall, she meets her distant mermaid relative Miranda, who looks exactly like her. She agrees to let Miranda trade places with her, while she goes on a bicycling trip with a friend. Caroline feigns an accident, which leaves her confined to a wheelchair for a few weeks and gets nurse Carey to attend to Miranda. This conceals the fact that Miranda has a fish tail instead of legs.