Undeterred by a spinal injury that leaves him confined to a wheelchair, Detective Robert Ironside leads his elite, handpicked team on a hunt to find a young broker's killer.
Whilst on the trail of a serial killer know as App the Ripper who's been tracking his victims down online, the team narrowly miss their man. Two figures who flee the scene, give them another lead to follow. As they track down the girl, they soon come to realise it's a girl missing from years ago.
After Ironside and Holly interrupt the robbery of a poker game, they follow the trail to a poker pro with a drug problem; Ironside considers how much faith to put in Teddy.
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.
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.
When art thief and suspected murderer Stan Nagy is released from prison, Ironside is forced to come to terms with a case, and a mistake, that have haunted him for years. Meanwhile, Virgil tries to recover from a violent incident in the field.
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.
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.
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.
