Perry Mason and Pete Strickland are hired by an attorney to solve a perplexing case: the brutal kidnapping of a one-year-old whose parents were targeted for a $100,000 ransom.

Following one of her trademark barn-burning sermons, Evangelical preacher Sister Alice (Tatiana Maslany) offers the Dodsons the church's full moral and financial support - much to her mother Birdy's (Lili Taylor) dismay. During a routine domestic intervention, beat cop Paul Drake (Chris Chalk) is re-routed to a gruesome crime scene, where he follows a confounding trail of evidence. Mason (Matthew Rhys) is left incensed by a jaw-dropping admission from Baggerly (Robert Patrick) and, after pressing Emily Dodson (Gayle Rankin) on her husband's alibi, finds himself confronted by an outraged Della Street (Juliet Rylance). Detectives Holcomb (Eric Lange) and Ennis (Andrew Howard) use Drake's (Chris Chalk) findings to their own advantage.

While Mason and Della are up north, Strickland tracks down the sergeant assigned to the Dodson case. Mason drops in on his ex-wife Linda and son Teddy. Della sets out to find Mrs. Dodson more capable legal representation.

Perry is having difficulties functioning in court, especially when new details are revealed.

Della presents a stubborn Mason with her case for putting Emily on the stand; Mason, Strickland, Della, and Drake attempt to tie up loose ends as the trial comes to a close.