Brad Taggart (Will Ferrell) is a kindhearted radio executive who wants to be the best possible stepfather to his wife's (Linda Cardellini) two children. When her freewheeling ex-husband Dusty (Mark Wahlberg) breezes back into town, Brad's feeling of insecurity quickly develops into an inferiority complex. As Dusty demonstrates his flair for athletics, home repair and bad-boy charisma, Taggart finds himself in a no-holds-barred battle to one-up his rival and win the approval of his family.
A young American named Greta (Lauren Cohan) takes a job as a nanny for an 8-year-old boy in a remote English village. To her surprise, Greta learns that the child of her new employers is a life-size doll. They care for the doll as if it was human, which helps the couple to cope with the death of their own son 20 years earlier. When Greta violates a list of strict rules, a series of disturbing and inexplicable events bring her worst fears to life, leading her to believe that the doll is alive.
Rookie lawman Ben Barber (Kevin Hart) aspires to become a detective like James Payton (Ice Cube), his future brother-in-law. James reluctantly takes Ben to Miami to follow up on a lead that's connected to a drug ring. The case brings them to a homicide detective and a computer hacker who reveals evidence that implicates a respected businessman. It's now up to James and Ben to prove that charismatic executive Antonio Pope is actually a violent crime lord who rules southern Florida's drug trade.