Beyond Cosmos: The Project X

Two years after the alien invasion, Cosmos City is safe and sound. Even The Guardians living their lives in peace. Jein and Joon, now a married couple, struggle to spend time together. Twix, now a Black Wolf, joins Justin for missions around the world. Cygnus is a director in Cosmos Memorial Hospital, while Sun is preparing for early retirement from Mountain Peek.

Things got pretty fine until an unexpected attack in the mid lunchtime, forcing Jein to shoot down a creature. Feeling uneasy, the Austins decide to send the corpse to the forensic room for further investigation. From the postmortem, they find a shocking truth hidden beneath the mystery creature.

Meanwhile, The Moon Clan is on verge of war when the future Luna goes missing. Twix decided to ask a help from the Guardians searching for the lost Luna. Things got even worse when suddenly one of them went missing as well.

What is the secret behind the mystery creature, and who kidnapped the Luna? Is there any link between these two cases?