From the Moon to Mars, from exoplanets to the icy moons of Jupiter, this documentary explores one of the greatest mysteries of our time: are we alone in space? Thanks to space missions, radio telescopes, and the latest technological advances, scientists are hunting for signs of extraterrestrial life, whether microscopic or intelligent. From messages sent into the cosmic void to research conducted on Earth, follow a fascinating scientific investigation that blends exploration, astronomy, biology, artificial intelligence, and philosophy. A dizzying odyssey to the frontiers of the unknown.