Detective Martin Riggs struggles with a personal tragedy and is assigned to a new partner, Roger Murtaugh, who prefers a more conventional approach to his work. Their first case unites their markedly different styles to resolve a hostage situation.

Riggs and Murtaugh become involved in a major case that involves military technology after responding to a routine noise complaint.

Murtaugh faces a tough decision involving his former training officer when he and Riggs have to work on a case dealing with a violent drug cartel.

Roger Junior catches up with an old friend who might be caught up in illegal activities. Death follows a set of burglaries.

A former Navy SEAL is embroiled in criminal activity, but his connection to Detective Riggs complicates matters.

Riggs and Murtaugh look into the death of a young model who has ties to a distinctly powerful family.