What is the main conflict in A Monstrous Regiment of Women by Laurie R. King?

In this novel, Mary Russell is investigating some mysterious deaths of women that are members of The New Temple, run by a woman, Margery Childe, who is a visionary. Mary Russell has her own thoughts on women's rights in London in the 20th century and so she becomes involved with some of the Temple's causes through Mary's friend from Oxford, Veronica Beaconsfield.