 While trying to restore the lawns at a school that caters to the children of wealthy foreigners, Rosemary and Laura become involved in a murder mystery. Angelica is an attractive Polish student who spurns the advances of more than one male at the school. When one of her suitors turns up dead, she is among the suspects and the women sleuths add the death of the man to their already perplexing problem of the death of patches of grass in orderly rows.