Two brothers, Ellis (Ethan Peck) and Carter (Adam Rothenberg), embark on a journey from New Mexico to find their estranged father in the hopes of saving Ellis, who has been diagnosed with terminal leukemia. Along the way while in Texas, they meet Krystal (Mariah Carey), an aspiring singer, who flees from her abusive husband, Frank (Lance Reddick), to join them on their journey.