The story of is a brutal prequel to the first Dead Space video game, detailing how the mining ship USG Ishimura became a floating tomb overrun by Necromorphs. The Discovery on Aegis VII

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: In her final moments, she launches a distress beacon while opening an airlock, sucking herself and a horde of Necromorphs into the vacuum of space.

By the end, nearly the entire crew is dead. Vincent discovers that the Marker actually creates a "dead space" around it that the Necromorphs cannot enter, but she is unable to stop the ship's decay.