When a father and his two young children go missing, the squad has to work quickly to find them, while uncovering a slew of terrible family secrets along the way. Meanwhile, Raydor does her best to trust Rusty as he begins to take suspicious trips out on his own.

The Major Crimes division faces a new challenge as they work to solve the murder of a dog that was left a 20 million dollar estate by his deceased owner. With the help of wannabe detective Jonathan Baird, aka Dick Tracy, the case takes a new turn as the squad begins to suspect foul play in the death of the dog's owner, a wealthy heiress.