Clam down : a metamorphosis

"After the dissolution of her marriage, a writer is transformed into a "clam" via typo after her mother keeps texting her to "clam down." The funny if unhelpful command forces her to ask what it means to "clam down" during crises-to retreat, hide, close up, and stay silent. Idiomatically, we are said to "clam up" when we can't speak, and to "come out of our shell" when we reemerge, transformed. In order to understand her path, the clam digs into...