Riggs and Murtaugh are thrown into the world of counterfeit money. When a group of teenagers inadvertently gets involved, it strikes a chord with Murtaugh, who is dealing with his own issues regarding his son, RJ.
Riggs dan Murtaugh dilemparkan ke dalam dunia uang palsu. Ketika sekelompok remaja terlibat secara tidak sengaja, ia menyerang akord dengan Murtaugh, yang menangani masalah pribadinya mengenai anaknya, RJ.