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