Two biologists meet on the eve of a prestigious conference. But the two women aren’t quite strangers. They share a complex and mysterious bond.

The up-and-coming evolutionary biologist wrestles for the truth with the established leader in the field. The older woman has earned fame for her work on the Grandmother hypothesis. The younger wants to present a radical new hypothesis to explain why human females menstruate while most mammals do not. The play deals with the workings of science and its impact on the personal lives of women scientists.

This intimate and keenly perceptive play explores the difficult choices faced by women of every generation.

Evolution and emotions collide in this smart and compelling play about science, family and destiny.