A deadly carjacking leads Nash and the SIU team to a drug dealer who owns a Hemi Cuda similar to Nash's. Meanwhile, Evan and Richard Bettina enter a transgender beauty contest to catch a killer.

Nash and his SIU team search for the source of deadly VX nerve gas before there are catastrophic consequences. Meanwhile, things heat up between Cassidy and Evan, and a young woman believes that Joe might be her father.