From The Perry Mason TV Show Book
Ethel Andrews is left waiting at the altar by her fiancé, Bruce Strickland, who also left her to take the blame for a $50,000 securities theft, since her signature was on the transfer authorization. Ethel leaves town and nearly has an accident with a car driven by Peggy Sutton, who is also on the run, but from a hired killer. Peggy persuades Ethel to swap identities for a week, but then Peggy dies in an auto accident.

Ethel is terrified when she finds $50,000 in the trunk of Peggy’s car. She goes to Perry for help, and he sends Paul to Lake Tahoe to find out about this Peggy Sutton. When someone kills Bruce Strickland, Ethel’s masquerade is over, and Perry’s job is just beginning.