The BAU travels to Mexico to aid in the capture of a serial killer who has targeted elderly women.
As Jesse enjoys a day sailing with his daughter, Gracie (Chloe Csengery), pirates suddenly seize their yacht, take all the passengers hostage and attack Jesse, leaving it up to his team to quickly locate and rescue his daughter.
While investigating a subway worker's murder in Central Park, Castle and Beckett unexpectedly uncover a boy's abduction.
After a student is gunned down in broad daylight, the investigation reveals she had more than a few secrets. Meanwhile, Jane's mother, Angela, and father get into a spat over the car.
Lola travels to Washington, D.C., to help her husband, Robin (Todd Williams), land an important job at the FBI. Also, Mark and Amy Quinn’s (Lindsey Gort) relationship heats up as Amy tries to put together a winning defense for Vic Callan’s (Tony Denison) murder case.