A plastic surgeon dies due to an overdose of laughing gas... with no shortage of suspects. Mark campaigns furiously to exonerate Bonnie Valin, the victim's wife, while Steve makes a solid case against her. Meanwhile, Amanda's new electronic checking service is less than effective.

Realizing that he's been duped, Mark goes all out to thwart the murderer's plans. Amanda and Jack go after Wallace Sterling, the crooked financier and art lover by selling a forged painting of a can of Cream of Celery soup.