De Niro plays Dick Kelly, a very recent widower who is being driven by his uptight corporate lawyer grandson Jason from the former's home in Georgia to his Boca vacation home, and the latter's marriage celebration and ceremony in Florida.  After 40 years of having only sex with one woman, grandpa Dick is ready to get his perv on by sowing his wild oats with college girls in Daytona Beach partying for spring break, and persistently cajoles Jason to try to remove the stick from his bum and party along with him, even if it comes at the potential cost of his impending marriage.