PARK CITY, UTAH Jan. 24 (UPI) -- Saccharine, which premiered Thursday at the Sundance Film Festival, has a provocative take on weight loss. Some of its depictions are more effective than others but overall it is a scary and poignant descent into obsession.

Hana (Midori Francis) is a medical student struggling between binge eating and working out. She lusts after gym rat Alanya (Madeleine Madden) who invites Hana to her training study.

When Hana reconnects with high school friend Melissa (Annie Shapero), Melissa shares her underground weight loss pills. She gives Hana two for free but the treatment costs $5000.

So Hana analyzes the compound and discovers it is human ash. Then she makes her own using leftover organs from her class cadavers.

The homemade pills have horrific side effects. The cadaver starts manifesting herself in Hana's waking life, escalating attacks no one else can see.