The film takes place in the year 2057, where the sun has begun to die, causing widespread devastation and threatening the survival of humanity. A team of astronauts, led by Captain Robert Capa (Cillian Murphy), is sent on a mission to reignite the sun using a powerful nuclear bomb. The team, which includes Mears (Chris Evans), Corazon (Rose Byrne), and others, embark on a perilous journey to the sun, facing numerous challenges and obstacles along the way.