Undergrowth, a plant-like monster, enslaves all of the citizens of Amity Park for destroying nature and he makes Sam the leader of the plants. Danny is unable to defeat Undergrowth and he retreats to the Ghost Zone to get help. Danny is soon found by Frostbite and he helps him control his new ability. Frostbite encourages Danny to not let his freezing powers take control of him in order to defeat Undergrowth. Danny arrives at Amity Park to free his loved ones and defeat Undergrowth. Danny uses his newfound ability to defeat Undergrowth by combing his ghost and freeze ray. With the crisis resolved, Sam and all of the citizens are set free from Undergrowth's grasp. Danny gives Sam a frozen crystal, he admits to her that he has found a new respect for nature and he tells Sam that he is glad that she is okay. Tucker starts a lawn mowing service in hopes to earn extra money and he runs over a powerless Undergrowth, much to Danny and Sam's amusement.
—dawsonpersi