Gamora arrives on Torndune—a once-lush planet that has been strip-mined for the power source beneath its surface—with a mission: collect the heart of the planet. She doesn’t know who sent her, why they want it, or even what the heart of a planet looks like. But as the right hand and daughter of Thanos, and one of the galaxy’s most legendary warriors, her job is not to ask questions. Her job is to do what she’s told, no matter the cost. What she doesn’t know is that her sister, Nebula, is in hot pursuit.