The famous Collie dog Lassie returns to the big screen in this thrilling family adventure and heartwarming story of the inseparable friendship between a boy and his dog. Sequel to LASSIE COMES HOME (2019) which was based on the classic original novel by Eric Knight, LASSIE - A NEW ADVENTURE is an unforgettable experience for all dog lovers big and small. Finally, the summer holidays are here! But Flo does not want to be separated from his beloved dog Lassie. So, while his parents set off for a holiday in Gran Canaria, Flo and Lassie go with family friend Gerhard to his aunt Cosima’s farm in South Tyrol. Cosima lives there with her foster children Kleo and Henri, and her Jack Russell Terrier Pippa. When Flo, Kleo and Henri hear about the mysterious disappearances of several dogs in the village, they are alarmed. But then there is a break-in at Aunt Cosima's house and Pippa is stolen! Together with Lassie, the three friends investigate and set out to catch the thieves and rescue Pippa.