I think the description on Vimeo kind of buries the lede for this one:
I love seeing collaborations like this. The sisters produced it as a trailer for Frances’s new book of poems, Beast (Augury Books, 2014). Here’s how they characterized the book at Vimeo:
In BEAST, Frances Justine Post explores the destruction and eventual reclaiming of the self following loss. Many of the poems make up a series of “Self-Portraits” that explore the psychological core of intimacy with its inherent devotion and betrayal, reward and punishment. In one, she is a wolf; in another, an equestrian and her horse; then a tornado, the dropped crumbs of a beloved, a pack of hounds, and finally a cannibal. The self changes form and species and switches from one voice to multiple voices. Each poem attempts to reinvent the self and alter it as a way of trying to understand what remains after devastation.