Overdefending the SB w/ a medium pair

[waffle]

PF raiser has only played a few orbits at this table, but given the play that I've seen and his 31337 name, it's safe to say that he's a TAG. What should be my plan when he raises the flop?

Party Poker 5/10 Hold'em (6 max, 6 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

Preflop: Hero is SB with 7/images/graemlins/spade.gif, 7/images/graemlins/club.gif.
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises</font>, <font color="#666666">2 folds</font>, <font color="#CC3333">Hero 3-bets</font>, <font color="#666666">1 fold</font>, MP calls.

Flop: (7 SB) 4/images/graemlins/diamond.gif, 2/images/graemlins/club.gif, 8/images/graemlins/heart.gif <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">MP raises</font>, <font color="#CC3333">Hero 3-bets</font>, MP calls.

Turn: (6.50 BB) 2/images/graemlins/spade.gif <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">MP raises</font>, Hero folds.

Final Pot: 9.50 BB

[TheCaptain]

fold preflop, if not call down after his flop raise hoping he is semi-bluffing with overs