A car bombing leaves two people dead and the FBI singles out a problematic Columbia student as the suspect. However, Ironside’s suspicions fall elsewhere and a deadly game of cat and mouse lands himself and the team at risk when the bomber strikes again.

Fleet Week in New York City goes awry when two marines and a seaman find themselves on the run after a pimp and prostitute wind up dead. As the team races to find the soldiers before a vicious street gang does, Ironside finds himself at odds with Capt. Rollins, who is grappling with demons of his own time in Iraq.

When a student from the wrong side of the tracks is kidnapped off a bus, it becomes apparent to Ironside and the team that the wrong kid was snatched. The race to rescue the hostage leads to a ransom payment of rare comic books and a teenage computer whiz. Meanwhile, through flashbacks, Ironside rekindles unpleasant memories from the past involving his father.

Ironside is forced to come to terms with a mistake that has haunted him for years; Virgil must recover from a violent incident.

What started as a wild rooftop chase quickly turns into a homicide investigation when the team discovers severed body parts in a garbage bag. When additional victims surface across the city, Ironside, Holly, Teddy and Virgil track the case that leads to the doors of a notorious motorcycle gang and a femme fatale.

Ironside and his team, including Virgil, Holly and Teddy race the clock to clear the murder of a New York University honor student, before a plea bargain will set a hit man free. In the process, Ironside seeks Gary’s expertise, but being back in that mindset could prove too much for him to handle.

Ironside's team investigates a string of heists at high-stakes underground poker games. Meanwhile, Teddy and Virgil's working relationship strains the investigation, threatening everyone's safety.

The team's hunt for a vengeful serial killer takes an unexpected turn when a missing person resurfaces and a new case emerges.