Conner's got his sights set on a girl named Krista at school. But she's a passionate, activist type, totally the opposite of himself. He tries (and eventually fails) to impress her by acting interested in her latest environmentalist campaign, to save an over 100 year old tree behind Reefside High that Principal Randall wants to tear down to put in a parking lot. Truth is, Mesogog wants the serum from the tree before anyone else can become aware of it's secret: it's growing over a Life Force Spring. Unbeknownst to him, Zeltrax, having laid low and injured since his apparent death, is already aware and wants the serum from this Tree Of Life to become stronger, and seek revenge on his enemies, which now includes his former master Mesogog and his former love-interest Elsa. He drains the sap, using it to gain a slightly upgraded form, and turns the tree into the Deadwood Monster. The Rangers use the Thundersaurus Megazord, and the new Triceramax Megazord, to destroy Deadwood and give the Evil White Ranger Clone and his Dino Stegazord another beating.
Conner doubts himself as a Ranger again, thanks to seeing how passionate Krista is about saving the tree, and he doesn't have the same kind of confidence in himself. He has a talk with Doctor Oliver, who hammers home the difference between cockiness and confidence, assuring him that if he believes in his deserving an inner power, he'll even surprise himself. This comes into play later, when Conner, faced with having to save Krista from Zeltrax, summons from within himself the ability to not only go Triassic without the need of his teammates, but gains a Battlized form ontop of it, with which he's able to save Krista. Zeltrax is defeated, reverting back to normal and vowing revenge. Conner helps plant a new tree where the Tree Of Life once stood, proving to Krista that he can indeed change, by displaying a newfound confidence in himself and what he's doing in life.