Ethan plays against Devin with their favorite card game, "Dragon Wars." He wins using the ultra-rare Ruby Dragon card, but in doing so attracts the attention of Prinicpal Randall, who confiscates their cards. Dr. Oliver is persuaded to talk to Randall about giving the cards back, and when going to visit her office, he witnesses her changing into Elsa! Tommy and Elsa do battle in the schoolyard, blowing her disguise as Randall in front of the whole student body, leaving a vacancy for Prinicpal of Reefside High. Trent goes to Mesogog's lab by himself, and tries to get the card back, but in fighting Elsa, accidentally ensures it gets turned into the Ruby Dragon monster. While fighting the Rangers, both the Ruby Dragon and Elsa make it known that Trent is hiding something from his teammates. He tries to play it off as his going after the card solo was the big secret. Ruby Dragon is destroyed by the three main Megazords. Elsa, again threatened by Mesogog for her failure, slips the Ruby Dragon card into Dr Anton Mercer's pocket, setting it up to fall out when he reaches for his cellphone while talking to the Rangers in the hallway of the high school. The stress of explaining how it got there leads to his transforming into Mesogog in front of the team! Mesogog thinks Trent set him up, the team realizes this was his big secret, and trust is lost from both sides on the White Ranger. (thetvdb.com)