“Harry Potter” thespian Evanna Lynch is starring in independent drama “Indigo Valley,” about a honeymoon trek in the Icelandic wilderness.

The project was unveiled last week at the American Film Market as a U.S.-U.K.-Icelandic co-production, with Courtney Harmstone producing. “Indigo Valley” is based on a short film by Jaclyn Bethany, who will direct and star in the film. The story follows a newlywed couple on a hiking trip as they’re unexpectedly joined by the woman’s estranged older sister, an actress recently released from rehab.

Bethany will play the older sister and Lynch will portray her newlywed sister. Jealousy, insecurity, and sexual tension run high in the desolate landscape of Iceland, highlighting the tumultuous future these three people face.