Los Angeles siblings Ellie and Jimmy carry grief like a second skin, their parents freshly buried, their social lives quietly fraying. One night on Mulholland Drive, a collision with something enormous and feral leaves both of them clawed and changed, their bodies beginning to answer to instincts neither can explain. Jimmy reads the signs clearly; Ellie resists. Around them, the city's glittering surface, wax museums, Hollywood offices, high school hierarchies, keeps moving, indifferent to what is crawling underneath it.