Complex sentence: Meister tells them that if they follow the script, they will return to the real world, warning them that if they die in this world, they die in real life ("Put a Little Love in Your Heart").
Split into simpler sentences: Meister tells them that if they follow the script, they will return to the real world. He warns them that if they die in this world, they die in real life ("Put a Little Love in Your Heart").