Subsequent deaths make it clear: San Francisco is in the grip of a killer with a dark and complex agenda and is now menacing Iris's own neighbourhood. The four unlikely allies struggle to work together - and in the process, not only expose a twisted operation, but also forge powerful and lasting bonds.

After a seemingly innocent man is charged with murder, the women become enmeshed in a tangled suburban tragedy, racing to find both the true killer and the methods before the scent goes cold. Meanwhile, Jean grapples with how — and where — to build a new life for herself.