Matlock is planning a birthday fishing trip with Leanne, but then he is called up for jury duty, which puts a damper on their trip. Despite his convictions that no lawyer would want him on their jury, Matlock ends up in the court room.

The nephew of an eccentric millionaire is accused of murdering his uncle after they were seen arguing and Cliff is sent to work in the uncle's zoo to gather information to exonerate him. Meanwhile, Billy persuades Ben to defend him in court after he becomes involved in an investment scheme gone awry. 

In the concluding part of the in which Cliff tries to exonerate an eccentric millionaire who has been accused of murdering his uncle. Meanwhile, will Billy's decision to hire Matlock to defend him in court pay off?