On a celebratory birthday trip, Caroline (Marguerite Moreau) visits her sister, Jackie (Bitsie Tulloch) and her boyfriend (David Giuntoli). But what starts out as a fun evening with close friends quickly goes askew, as the effects of the sisters' obscure past begins to take its toll on the night's affair. Caroline and the group attempt to support Jackie for an apparent illness - though it's unclear who really needs the most help.