After all these years of being friends with Knuckles, Sonic begins to wonder-how does the Master Emerald stay safe, even when Knuckles isn't there to protect it? After tricking his friend into leaving it alone, Sonic decides to go to find the truth about the Master Emerald's "Lucky Streak". What he finds changes everything, and he finds it just in time-Sonic's trick goes a bit overboard and accidentally leads to Knuckles' capture! Sonic Must team up with an unexpected ally to save his friend from Dr. Eggman's clutches.