In the near future, a colossal and mysterious object of unknown origin appears in Earth's orbit. Due to its shape, the world calls it the Metahedron. A crew of four, named S.C.A.R. (Sentient Contact Assessment and Response), travels with the ship Hermes to analyze the mysterious alien object.

As they approach the Metahedron and begin to scan it electronically, the object starts pulling Hermes towards it. The crew loses control of the ship and everything turns white. The game's heroine, Kate, regains consciousness on an alien planet – she is completely alone and the other crew members are nowhere to be seen. As she begins to see visions of a spectral figure, she discovers that weeks or even months have passed since the start of her mission. Kate also learns that her team has managed to survive on the planet. As she searches for them, she discovers that the mission leader (Robinson) has mutated into a hideous creature, but Tamara and Mike (the other members) are still alive, although Mike seems to be starting to mutate and Tamara has disappeared looking for a way to help him. Thus begins a mission to find and save them.