Detective Ellery Queen has to solve a series of murders where the victims were killed in numerically descending ages, the male victims were strangled with blue cords and the female victims with pink ones.
2010
1965
1949
2006
1976
2013
1975
2000
2002
2005
1973
1978
1990
1970
1968
1986
1988
1981
2003
