Joseph convinces Tia to go undercover and join the gang, but the plan goes astray when he starts to think that maybe Tia has gone over to the dark side for real. Joseph knows the gang is up to something but can't figure out what, so sending Tia in to spy for him seems like the perfect solution. They stage a fake fight and Tia storms off, and is quickly taken in by Steve (the gang aren't so sure). But the last thing he expects is for her and Steve to grow unexpectedly, uncomfortably close. Would his trusty protégée really leave him for Steve and his criminal ways? The rest of the gang is equally worried, because Steve has ignored their ultimatums and abandoned them for a girl...Is this the end of Street Smart?