The Quest for the Lost Map

Isabel Ricardo Andy, Kelly and Mike are on vacation in Sesimbra. They meet the mysterious Sarah Santiago, an orphan who lives with her miserly, hateful aunt and uncle, who make her life miserable. Unexpectedly, the four youngsters dive into a whirlwind of astonishing events, coming across an elderly Frenchman imprisioned in Saint Mary Castle and becoming entangled with a dangerous international gang that searches for a map that was lost many centuries ago.