Hans was called to quest

An adopted black cat with a question mark tail, a swirling orb deep within an underground abandoned metro railway station and two quest explorers venture where no children have gone before. Hans and his best friend, Gretel, are on a quest within the bustl-ey city to search for the library that houses books that stand like soldiers on a shelf. This library, with real turn the page and dog-eared books, has become a childhood myth; however, after Hans' nanna had told him of this myth and warned of the dangers, Hans could not resist. Hans was called to quest: a modern-day fairy tale, takes the children on a journey where cats talk, a witch hoards, books fly, and an evil little man named Rumpelstiltskin devises a plan to keep the children locked up in fairy tale land forever. Will he succeed? Or will our two explorers return with a fulfilled quest?