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.
1982
1979
1960
1955
1929
1950
2003
1947
2002
1954
2005
1972
1956
1995
2008
2012
2006
1974
2014
