Ad-exec Dustin Hoffman learns how to be a better father when wife Meryl Streep departs to "find herself", lumbering him with their little brat, whereupon Dustin goes to extreme lengths to be a wonderful, caring kind of dad, sacrificing all for the kid, even though you can't help thinking that someone on his Madison Avenue salary could surely afford a child minder two mornings a week.
Some nice chemistry between the warring spouses though and an upsetting, memorable scene when Billy wants ice-cream for dinner.