When a gifted psychic -- or, at the very least, a gifted conman -- enters 15 Division to help find the missing witness in an organized-crime case, the officers are forced to come face-to-face with some of the hidden truths about themselves and the people they work with.
Before their parents got married to one another, 15-year-old Derek and 14-year-old Casey ruled their respective houses as the oldest sibling. Now they're in constant rivalry for top dog status of the five kids all living under one roof. The two teens will plot anything they can think of at school, with friends or other siblings to win these funny family battles.
Elsinger's boss is revealed to be a nearly immortal evil Frenchman, who seeks the key to immortality and is ready to kill the entire team to get it. The team tries to expose him with Kelly's help, but Elsinger has something else in mind.