After suddenly finding herself alone in the World Behind the Gate, Rehtona collects "memory fragments" (scattered throughout this world) in order to find out what happened – but whenever a complete image is assembled, a memory that doesn't seem to belong to Rehtona becomes imprinted onto her mind. Each level features a complete sequence of puzzles derived from the in. Rehtona tells the story of a girl trapped between two contrasting worlds: the ordinary world, and the World Behind the Gate.
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