From The Perry Mason TV Show Book (Revised)
This is the episode where Della asks Perry how far he would go for a friend and then asks for $25,000. Della needs the money for her friend Janet Brent, who is being blackmailed. Edward Franklin, an employee of Janet’s husband, has staged compromising photos of her in a motel.
At a party, Janet confronts Franklin and hits him with a small statue of a “weary watchdog.” The police arrest Della when they find her driving Janet’s car from the scene of the argument.
Franklin is dead, struck three times on the head with the statue. Janet claims she only hit him once and Perry believes her.
Perry takes the case knowing that if he loses, Della will go to prison as an accessory.
N.B. Spoiler removed. To view, click above link for original summary.