When the team is investigating the murder of a probation officer and a hostage situation, Horatio learns that the main suspect could be his son.

Kyle's mom shows up in Miami and she is the widowed wife of a billionaire. She wants Kyle back and will do anything to get him back.

In the first of a two part episode, Horatio once again has to tangle with his ex, Julia, who has it out for him. Someone is out for Calleigh, and is compromising their investigation in the process.

In the second part of the two part episodes, Horatio deals with his past and the rest of the team works to rescue Calleigh from kidnappers.