In the 2015 sequel Belle & Sebastian: The Adventure Continues , set just after WWII, young Sebastian and his dog Belle embark on a dangerous mission to find his aunt Angelina, who is missing after a plane crash. Alongside his grandfather and a rugged pilot named Pierre, who is revealed to be Sebastian's biological father, the group navigates treacherous, burning forests and rocky terrain to rescue her. You can find more information about this film on IMDb and Into Film . Belle & Sebastian: The Adventure Continues (2015) - IMDb