A quartet of retirees gather in Las Vegas to celebrate a bachelor party in the honor of their friend and lifelong womanizer. Academy Award® winner Michael Douglas stars as an infamous philanderer who decides to finally settle down and get married to a woman half his age. The festivities officially begin when Academy Award® winning co-stars Robert DeNiro, Morgan Freeman and Christopher Walken join in. This roller coaster ride of senior debauchery proves that even in your twilight years, what happens in Vegas, stays in Vegas.