After catching up to the tailed frog that stole the Red Chaos Emerald, Tails is shown a vision of the past and finds his Rhythm Badge upgrade. Once back in Mystic Ruins, the fox has a scary encounter with a huge cat that seems to want the frog. With the Emerald secured, Tails launches the completed Tornado 2 in search of Sonic.
Big's reunion with Froggy is short-lived, as Gamma snatches the frog away and Big gives chase as the pair return to the Egg Carrier. Still unnoticed, Knuckles follows them in his hunt for the remaining Master Emerald pieces.
Sonic leaves the Speed Highway, still searching for Amy. Learning that she has been captured, Sonic gives chase but the robot is transported back to the Egg Carrier leaving Sonic to try and cut off the ship by climbing Red Mountain.
While Sonic travels the dangerous mountain, Gamma presents the tailed frog to Eggman. The doctor is thrilled with Gamma, and orders him to get the Flicky imprisoned earlier with Amy. However, Amy is able to convince Gamma to let her escape.
Sonic makes it to the peak of Red Mountain just a few seconds too late to jump aboard the Egg Carrier, but thankfully Tails arrives to give Sonic a lift. Together, they chase after the massive war ship, and this time they are going to land on the carrier one way or another...
