A Chinatown robbery by three men goes south when one security guard is killed and the other mistakenly fires shots at a gas tank, burning two of the robbers alive. While investigating the heist, Detective Stella Bonasera uncovers a kidnapping plot involving the bank's manager. Making matters worse, the kidnappers' ransom drop spot is blocked by an unannounced police terrorist response drill, forcing the team to uncover new clues to find the missing child.