Summary written by Stan....Julie bows to Stan chanting..."I am not worthy"..(~_^)
The episode begins with a small creature (Calumon) being chased by a much larger one (in fact, Maildramon). Just as Maildramon catches up with Calumon, a DarkTyrannomon slams into Maildramon.
As Calumon watches the two fight, a giant explosion sends the tiny one flying. The last thing Calumon sees before leaving the Digital realm is that the DarkTyrannomon has turned into MetalTyrannomon. Shortly thereafter, Calumon finds itself in the real world.
Meanwhile, Takato is playing Digimon cards with his buddy Kazu just before school. Takato has just digivolved his DarkTyrannomon into a MetalTyrannomon, defeating Kazu's Maildramon. Kazu suddenly bolts, reminding Takato that class is about to start. In his haste to catch up, Takato knocks his card collection over. While quickly picking them up, he stumbles across a Blue Card. Like any kid, he swipes it through his Card Fighter Ex, then runs to school.
However, Takato is late once again, and is forced to stand outside his class in the hallway. While there, he begins to doodle his own Rookie Digimon. An accidental crass comment to the teacher keeps him in during recess, where he names the Rookie--Guilmon. At that moment, one of Takato's classmates (Jeri) comes up--a puppet-wielding girl. Her manner of admonishing Takato through her puppet is very...well...odd. A ways away, in the twin towers, lurk some very unsavory characters. Two (Riley and Tally) track Digimon down on large screens while the third (Yamaki), obviously the boss, plays with his lighter.
After school, a storm begins to form on the horizon. Takato rushes to get his card collection, and is startled to see his cards' box glowing. He takes out his Card Fighter Ex and watches as it turns into a D-Power. Calumon, meanwhile, sighs unhappily, wishing for someone to play with. Takato, excited by his discovery, races home, theorizing all the way. The Card Fighter changed, it was now something that was not a part of his world, so it must be something Digimon-related. Takato decides he must be a DigiDestined, or as they are now called in Season 3, a Tamer. He swipes Guilmon's picture, and it proceeds to get stuck. The D-Power then swipes Guilmon, and several other pages of Takato's notebook. A DigiEgg appears on the screen of the D-Power. Late that night, the storm breaks, and Takato falls asleep, his D-Power in his hand.
He then "dreams" of a fight between a Lynxmon and Renamon, Rika's (another Tamer) Digimon. Guilmon stares from inside his egg as the fight quickly becomes one sided, Renamon the victor. The next morning, Takato tries to convince his friends of what happened, but they write it off as a crazy dream (and Takato as a bed-wetter, to boot). Takato is then startled to discover his DigiEgg has hatched. The D-Power now plays as a compass, telling Takato where to find Guilmon. The Twin Tower bad guys are now aware of Guilmon.
When a bright beam of light shoots into the sky, Rika and Henry (another Tamer) are aware of him, too. After romping through dark alleys and odiferous sewers, Takato comes upon a construction site, where the bright beam is shining. An explosion rocks the area, then turns to smoke. The smoke begins to fade, revealing...a living, breathing Guilmon! Takato is beyond excited to see his Digimon come to life, until Guilmon spots a rat. Digimon eyes rodent, then blasts it into smithereens. Takato is now terrified, until a very gentle Guilmon nuzzles him and convinces him he won't hurt the boy.