After completing repairs on an old satellite, an astronaut becomes mesmerized by a mysterious black cube that suddenly lurches in space, severing his security cable. Intent on catching the cube in spite of the dangers, his oxygen is almost gone when he finally snares it.  There’s no chance to return to his own craft, but the cube abruptly teleports him to an unknown spaceship, and now he’ll need to find a way to escape and make his way home.