Kokovios and Sparos in the Spider's Web

Summary

A scientist, inventor of the "ray of life", is found murdered. The perpetrators are Arachne and the inventor's former assistant, Mona. However, the two naive servants of the deceased took the blueprints of his invention with them when they left: Kokkovios and Sparos. Arachne and her gang constantly set traps to extract the coveted paper from the two fools.