The pitcher of a women's semi-professional baseball team gets murdered. Mary shows a previously unrevealed talent as a keen recreational player, stepping up to the plate as relief pitcher in the big game.
A magnificent diamond, one of a famous named pair, has been stolen. Drake Private Detectives take part in the search and, of course, Frankie's mother gets involved.
Frankie and Trudie get hired as drinks waitress and croupier at Bess Starkman's illegal casino which has been robbed. Then Frankie gets accused of murder.