Garrett must overcome his arrogance in order to become the new Mystic Knight when he fights a giant spider in Banshee Woods. While Garrett is tangling with the giant spider, Mider summons four of the Spectres of the Banshee Woods to fight the other Knights.

Ivar is told the story of how Angus and Rohan became friends as children as well as how Torc joined with Maeve.

Ivar finally manages to steal back his people's chalice from Torc. However, the chalice is Mider's link to the dark realms and taking it back to Ivar's kingdom is too dangerous. Ivar decides to take the chalice anyway but is captured by Maeve while Mider is left stranded at Castle Kells.

In order to stop a storm of dark magic, the kings of Kells and Tir Na Nog must switch places for a day. While Conchobar organizes the fairies into a fighting force, Fin Varra's more fun ways with the Kells soldiers leave them vulnerable to attack.

After saving a wood elf, Angus is offered one wish and the other Knights pressure him to use it for their own desires.

The Knights must find the kidnapped Fin Varra before Maeve steals his powers.

Jealousy of Rohan's prominence leads Angus to a falling out with his friend.

A young prince who seeks to have his kingdom ally with Temra comes to claim it and the Knights must keep him safe, despite his bratty attitude.

Maeve casts a spell on Rohan that makes him doubt in his abilities and weakens him in battle.

Maeve resurrects the legendary warrior Balin and sets him against Kells, forcing Rohan to battle his idol.

Maeve awakens an ancient warrior who uses a scepter to take over the minds of Kells soldiers and the Knights.

As the war turns against her, Maeve pulls out her secret weapon that was bred by her teacher Nemain: Lugad, a monstrous warrior.

Lugad helps turn the tide of war for Temra as the Knights must figure a way to stop him. Rohan undergoes a dangerous test to gain the powerful Battle Fury armor.

Rohan faces Lugad one on one and makes a stunning discovery that links them together.

Rohan must try to convince Lugad of the truth about them.

Captured by Maeve, Rohan is shocked to learn the secret of his origins.

Contemplating leaving Kells, Rohan decides to stay and fight as Garrett returns to aid in the battle.

Mider tricks the Knights into giving up their weapons as he takes over Tir Na Nog.

Aideen accepts a spell from Maeve that turns her into a human so she can pursue Rohan. Maeve uses the opportunity to capture Deirdre, forcing Aideen to choose the princess or her new form.

Ivar battles the Sea Serpent of Temra for his armor and his feelings about being in Kells. Meanwhile, the others protect a village from a Cyclops.

The Knights must free Pyre in order to defeat Tyrune.

Maeve uses a spell on Garrett to turn him into her fighter. He soon manages to defeat the Knights and steal their weapons.

Deirde faces the Lightning Bat of Temra for her suit of armor. Meanwhile, Maeve tricks Rohan into thinking that Temra wants peace with Kells so that she can sic the Tash Hound of Temra on him.

Maeve has her soldiers kidnap Angus to keep him from facing the Rock Wolf of Temra. When his friends rescue him, Angus confronts the Rock Wolf while the others fight the Bull of Temra.

On an errand for Cathbad, Deirde drinks from a magic pool that turns her into a hag. When she goes to Fin Varra for help, he's taken by her new appearance and shrinks her down to be with him.