Nash has 14 hours to find out if a man set to be executed is innocent. Lucia is expelled from school for fighting and Joe's attempts to reach out to the other student's father result in violence, a threatened lawsuit, and a smashed trophy.

Nash and Joe are on the trail of a renowned assassin who has come to San Francisco to kill FBI special agent David Katz. Lisa Bridges returns from Paris and announces she's engaged to marry a famous French chef named Henri, but there's a problem; Nash and Lisa's divorce was never finalized. The new S.I.U. headquarters is introduced.