Yoda and a class of Padawans fight to prevent the creation of a super weapon that could win the war for the forces of evil.

Darth Sidious shows off the new Sith clone, JEK 14, an extremely powerful weapon of the dark side. However, JEK has a mind of his own and wants to be his own master. It's up to Yoda and the Jedi to stop the Sith -- and to try and bring JEK 14 to the side of good.

Obi-Wan discovers that several major Sith lords and their apprentices are gathered at the planet of Mustafar. The Jedi must hurry to Mustafar to destroy the Sith, but it's a trap and the Republic fleet is destroyed. Yoda, Anakin and the Padawans travel to Endor to find JEK. All hope now rests on JEK to come to the rescue.

Luke's poor judgment nearly gets him and his friends captured by Darth Vader, and, after witnessing this bit of immaturity, both Yoda and the ghost of Obi-Wan make the decision to expand Luke's training and bring out the last of the Jedi Holocrons.