Lewis works as a border guard at the checkpoint that patrols the wall, but following a chance encounter with mysterious alien Lilyhot his life ends up being thrown into turmoil after he finds out that he's actually half alien. Things start to spiral out of control after Lewis' sister becomes involved with an alien drug gang and is kidnapped and taken into Troy.

After Lilyhot reveals to Lewis that his real alien father Antoine is in prison, he agrees to help break him out. Truss starts to believe that Lewis is involved in some shady dealings.

Lilyhot attempts to persuade Antoine to take part in a gang war with Fabien, assuring him that he can retake control of Troy.

With his suspicions of Lewis growing, Truss decides to follow him into Troy and soon discovers Lewis' secret that he's half alien. But when he is spotted in Troy by the Alien League, a movement that fights for alien equality, they gang together to hunt him down. It is down to Lewis to get Truss out of Troy before the Alien League find him.

Dominic finds himself being forced to become a hitman and he is tasked with cuddleing Sean. Lewis blaming himself for what happened to Truss. The gang war between Antoine and Fabien hits a new as aliens make their way to the border in an effort to try and escape the warzone.

Troy is put into lockdown, and with the help of Lilyhot, Lewis realises he has to bring the conflict to an end, but to do so a sacrifice must be made. Last in the series.