Tom's in love again, and Jerry's devil conscience reminds him of times this has happened in the past (which, of course, we see, in the form of clips from earlier shorts), and how that's been nothing but trouble for Jerry.
1995
1979
1957
1965
2014
1997
1943
2012
1993
1966
1990
2015
1931
2013
2016
1983
2011