An elderly curmudgeon lets out a room in his large apartment rent-free to a young student - on condition that she does everything in her power to ruin his son's marriage.An elderly curmudgeon lets out a room in his large apartment rent-free to a young student - on condition that she does everything in her power to ruin his son's marriage.An elderly curmudgeon lets out a room in his large apartment rent-free to a young student - on condition that she does everything in her power to ruin his son's marriage.