Movie
Project Hail Mary
Tropes in this movie
Humans Never Give Up
highGrace faces objectively hopeless circumstances — sole survivor, amnesia, light-years from Earth, extinction-level threat — and repeatedly refuses to quit. He solves problem after problem through sheer persistence. His final decision to sacrifice his return home rather than abandon Rocky embodies resilience as the defining human trait. Hope persists when logic says it shouldn't.
About this trope: Facing impossible odds, humans endure, adapt, and find reasons to keep going. Resilience and refusal to surrender is humanity's defining and most admirable trait.
One Hero Changes Everything
mediumAn extinction-level crisis affecting all of humanity is resolved by one person's individual discoveries and sacrifice. Grace is the sole survivor of the mission, personally discovers the astrophage-eating organism, and sends the critical data back to Earth. Without him, Project Hail Mary fails entirely. Institutional efforts set up the mission but are helpless without his individual actions.
About this trope: One exceptional individual matters more than institutions or collective action. Problems affecting millions are solved by a single remarkable person. Everyone else is passive.
Power Means Duty
mediumGrace initially refused the mission and was involuntarily placed aboard — a reluctant hero resisting responsibility. Once he recovers his memory, he accepts the duty his unique position demands. He ultimately sacrifices his chance to return home (personal happiness) to send data back to Earth and save Rocky, choosing obligation over self-preservation.
About this trope: Those gifted with extraordinary abilities, wealth, or status have a moral obligation to use them for others — and the weight of that duty can be crushing. Privilege creates obligation.
Humanity Must Unite
mediumTwo species from entirely different star systems — humans and Eridians — face the same existential astrophage threat and cannot solve it alone. Grace and Rocky, representing their respective civilizations, set aside vast biological and communicative differences to cooperate. Victory for both worlds is impossible without their cross-species partnership.
About this trope: A shared external threat forces divided groups to set aside differences and cooperate. Unity across lines of division is both necessary for survival and morally uplifting.
Full plot (spoilers)
Science teacher Ryland Grace awakens from an induced coma aboard an interstellar spacecraft with retrograde amnesia, discovering he is the sole survivor of the three-person crew and is light-years from Earth. Through returning memories told in flashbacks, he learns that Earth faces an extinction-level threat: single-celled organisms called astrophage are feeding on the Sun's energy, causing catastrophic dimming and global cooling that will eventually freeze the planet. Astrophage are impenetrable to electromagnetic radiation, breed on Venus by consuming its carbon-dioxide atmosphere and solar energy, and produce propulsive emissions as they migrate between Venus and the Sun. Scientists harness these emissions to build an extraordinarily efficient but dangerous spacecraft engine. Grace, originally a reluctant participant who refused the mission, was involuntarily placed aboard the ship as part of 'Project Hail Mary,' humanity's last-ditch effort to find a solution at Tau Ceti, the only nearby star system unaffected by the astrophage. As Grace approaches Tau Ceti, he detects an alien spacecraft. The two ships dock, and Grace establishes communication with an eyeless, spider-like, five-legged alien pilot from the 40 Eridani A system, whom he names Rocky. Despite their vastly different biologies and environmental needs, the two form an unlikely partnership. Together they discover that the planet Tau Ceti e harbors an organism that preys on astrophage, which could be the key to saving both their worlds. During a dangerous fuel-gathering mission, Rocky saves Grace's life but is severely injured. On the return journey, Grace discovers that mutated astrophage organisms are consuming his ship's fuel, making a return to Earth impossible. Faced with a choice between saving himself and saving Rocky and the Eridani people, Grace chooses to sacrifice his return home, sending his critical research data back to Earth via automated probes. Earth receives the data needed to combat the astrophage threat and begin recovery. Grace, unable to return, lives out his days in an Eridian biodome habitat, teaching science to Eridian children.
Sources: Wikipedia, IMDb, Fandom wiki (search snippets), TMDb