With Susannah ostracised, the children's hold on Midwich strengthens. When Paul awakens to the children's true nature, he pleads with Susannah to try to forge a truce with them. Meanwhile Zoe and Sam are galvanised into action by another miracle.

After more bloodshed, the children plan to leave. Susannah volunteers to go with them and strives to get Cassie to safety. It is evident now that they must be stopped. And there's no easy way out.