The high-flying journey begins when Pazu, an engineer's apprentice, finds a young girl, Sheeta, floating down from the sky, wearing a glowing pendant. Together, they discover both are searching for the legendary floating castle, Laputa, and vow to unravel the mystery of the luminous crystal around her neck. Their quest won't be easy, however. There are sky pirates, secret agents and monumental obstacles stopping them from discovering the truth - and each other. However, Laputa is more than it appears, and some seek to use it for evil.