We start the episode at Jack's house, where he is fiddling about with a spreadsheet he has made to keep track of everyone's Shen Gong Wu. Wuya once again gets angry at him for not taking the search for the Shen Gong Wu more seriously, but is interrupted by the emergence of a new Shen Gong Wu: the Heart of Jong.

The Xiaolin Warriors arrive at a forest. After being attacked by a squirrel, Omi finds the Heart of Jong, but Jack manages to grab it from him. Jack tries to escape, but is prevented from doing so by Clay, and a Xiaolin Showdown follows.

In keeping with the forest's environment, (and its many squirrels) Omi challenges Jack to an acorn collecting competition; whoever can collect the most acorns before the time runs out will win the Heart of Jong. Omi chooses to use the Jetbootsu, and does well at first, while Jack uses the Lotus Twister to stretch his arms. Jack, however, wins the showdown, and now has the Jetbootsu and the Heart of Jong to add to his section on his spreadsheet.

Later, Omi is depressed because of his loss. Master Fung told him that losing one Shen Gong Wu is not the end of the world. Then Master Fung becomes scared (mentioning it is the end of the world) when he realizes that Wuya now has the Heart of Jong because he knows what Wuya is planning to do with it. With the Shen Gong Wu in her possession, Wuya can now use the Heart of Jong to bring an ancient fearsome warrior to life - Mala Mala Jong.

In Jack's lab, laid out flat on a table, are the various Shen Gong Wu that make up Mala Mala Jong. There is the Two Ton Tunic for the body, the Fist of Tebigong and the Third-Arm Sash for arms, and the Shroud of Shadows acts as a cloak/cape. Jack adds the Helmet of Jong, the Eye of Dashi and the Jetbootsu, and then finally the Heart of Jong. The Heart of Jong brings the warrior to life. Wuya decides that she does not need Jack anymore, so she leaves him, and heads directly for the Xiaolin Temple with Mala Mala Jong.

Meanwhile, high atop a mountain, the Xiaolin Warriors are trying to come up with a plan to stop Mala Mala Jong. They realize that somehow the Heart of Jong is the key to defeating him. If they remove it, he will turn back into the original Shen Gong Wu that he was made of. The problem is: how can they remove it? Clay suggests using the Serpent's Tail to go through the armor of the Two Ton Tunic, but Kimiko rebuttals this, saying that even with the Serpent's Tail, they will not be able to avoid the lightning blasts from the Eye of Dashi. Omi turns to ask Raimundo for some ideas - before realizing that the Brazilian is gone. The Sword of the Storm is missing, too.

Mala Mala Jong attacks, and Raimundo counters with the Sword of the Storm. The tornado has no effect, however, and Mala Mala Jong takes the Sword from Raimundo, before blasting him with lightning. Wuya asks Raimundo where the others are hiding. Raimundo refuses to tell her anything, so she shrinks in size and goes inside Raimundo's mind, extracting the information she needs. The remaining Chosen Ones are on Mount Hong.

On Mount Hong, Omi has a plan to use the Serpent's Tail to retrieve the Golden Tiger Claws from the Earth's core. Using the Tiger Claws, he will be able to remove the Heart of Jong. Mala Mala Jong is then seen down below, so Omi uses the Serpent's Tail to look for the Tiger Claws, traveling underground. Clay and Kimiko try to stop Mala Mala Jong using the Tongue of Saiping, the Orb of Tornami, the Monkey Staff, and the Star Hanabi, but they too are defeated. Omi, who finally gets a chance to actually use the Tiger Claws by removing the Heart of Jong, saves them at the last minute. Mala Mala Jong reverts to being the regular Shen Gong Wu, while Wuya floats away in defeat.

Later, because of their bravery, Clay, Kimiko and Omi are each given sashes to show that they are now Xiaolin Apprentices. However, Raimundo does not receive one because of his reckless disobedience. Raimundo storms out of the temple angrily, wishing he had stayed in Brazil, while a scheming Wuya watches on.