Detective Allison McLean puts her law-breaking brother Tim behind bars, and quickly decides to move his two resentful teenaged kids in with her own two children and devoted husband. Meanwhile, Allison and her partner race the clock to find a wounded pregnant girl and her boyfriend who have committed a robbery.

The complicated relationship between two brothers clouds an investigation for Allison and Devin. When Matt takes Allison on a romantic date, Cameron and Mariah break house rules challenging Rachel and Jeff.