Riggs and Murtaugh respond to a noise complaint at a party at heavyweight boxer Ronald Dawson’s Hollywood hills home. When gunshots go off, they are drawn into a major case involving illegal gun runners with advanced military technology. Riggs becomes personally invested in the case when he discovers one of their targets is a pregnant woman who reminds him of his deceased wife. Meanwhile, Trish worries about Murtaugh’s health, as partnering with Riggs tests his limits.