Box of Moonlight (1997)

Al Fountain, a middle-aged electrical engineer, is on the verge of a mid-life crisis, when he decides to take his time coming home from a business trip, rents a car, and heads out looking for a lake he remembers from his childhood. But his wandering takes him into the life of Kid, a free-spirited young man who helps Al escape from the routine of everyday life and find freedom to enjoy himself.