In the "Eternal Night City" where memories can be extracted, repaired and traded, the top memory restorer "Zero" is a man without a past. He can piece together anyone's broken soul, but he can't illuminate the void in his own heart. One day, a mysterious woman named "Wei" brought a chip carrying a "ghost memory" - a reverberation that should not exist, but repeatedly burned her nerves. In order to find out the truth, Zero accepted this taboo commission. When he dived into the sea of broken memories, he discovered that the shadow of the silver butterfly flying in Wei's memory was covering his own forgotten island. This restoration journey is destined to awaken a cruel truth that can subvert the entire Eternal Night City.
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