Complex sentence: The film is The First Film of the tetralogy, which tells about The Newcomer Vaniusha, that following three films called "Vaniusha The Newcomer", "Vaniusha and The Space Pirate" and "Vaniusha and The Giant".
Split into simpler sentences: The film is The First Film of the tetralogy, which tells about The Newcomer Vaniusha. The following three films called "Vaniusha The Newcomer", "Vaniusha and The Space Pirate" and "Vaniusha and The Giant".