Two years before the start of the series, Roberto "Coach B" Sebastián, Sr.'s son, Roberto "Basti" Sebastián, Jr., was killed by a gunman from a large syndicate which brought down the Barangay 143's Powerhouse team and led to today's events. Bren Park, a player for a Korean basketball team, had lost recently his family in a tragic accident during a snowstorm in South Korea that led him to quit basketball. However, following a revelation that he was his mother's child to a Filipino man, Bren went to Manila to search for him. Along the way, he joined a local basketball team, the Puzakals of Barangay 143.

The stage this time is the UA dormitory just before season 5's Endeavor Internship arc! In the middle of winter, a hot and blustery cold battle is unfolding at Heights Alliance! Third-year Mirio Togata appears suddenly as the first-year students in Class A are bored during their ban from going outside. He brings with him the card game "Yuuei Heroes Battle," created by the support class. As each student picks cards and joins the fierce battle, there seems to be more to the game than meets the eye. At the end, who will emerge victorious?

In a world filled with planes and airships, Sheeta is a young girl who has been kidnapped by government agents who seek her mysterious crystal amulet. While trapped aboard an airship, she finds herself without hope—that is, until the ship is raided by pirates. Taking advantage of the ensuing confusion, Sheeta manages to flee from her captors. Upon her escape, she meets Pazu, a boy who dreams of reaching the fabled flying castle, Laputa. The two decide to embark on a journey together to discover this castle in the sky. However, they soon find the government agents back on their trail, as they too are trying to reach Laputa for their own greedy purposes.

Tenkuu no Shiro Laputa follows the soaring adventures of Sheeta and Pazu, all while they learn how dreams and dire circumstances can bring two people closer together.

[Written by MAL Rewrite]