Bird Box jumps between two timelines – we start with Malorie (Sandra Bullock) and two kids travelling blindfolded in a boat down a river, where to we do not know, but right from the opening scene learn that they must not look or they will die. The second timeline is about 5 years earlier where we meet a then heavily pregnant Malorie and her sister Jessica (Sarah Paulson), as they see news reports about some unexplained phenomenon in Europe and Russia causing mass suicides.