Kate Winslet plays Mary Anning, a fossil hunter used to a near-solitary life of selling fossils to make ends, until fate aka a wealthy tourist forces her to hire his ailing wife, Charlotte Murchison (Ronan), as an apprentice. 

Their temperamental relationship gradually transforms into an intense friendship and a passionate affair, forcing them both to reevaluate their past and future. 

You can watch the trailer here: 

All images are screenshots from the trailer. The film will premiere at the Toronto Film Festival in September.