Nearly three decades after a close encounter of the fourth kind, the intergalactic outlaw, Peter Quill, aka Star-Lord, steals a precious artefact known as the Orb, intent on selling it. Now, the notorious scavenger has to form an uneasy alliance with his fellow inmates--Thanos' adopted daughter, Gamora; the former criminal, Drax the Destroyer; the genetically enhanced creature, Rocket Raccoon, and the plant-like organism, Groot--to thwart the evil plans of the radical Kree warlord, Ronan the Accuser. Are the mismatched Guardians of the Galaxy the cosmos' last hope?