Hand one of three/ Party MDG hands (again be calm with me as I learn)

[sublime]

Probably standard to most, but these are the hands I wrote down so I wanted to post them and get some feedback.

1st Hand

blinds 100/200 I have T2905

UTG (T3205)(no read) limps, folded to me in BB and I check with K4 [img]/images/graemlins/diamond.gif[/img]

** Dealing Flop ** [ 6c, 9s, Kh ]

I bet 300, UTG raises to 600

My plan, and what should I be thinking here?

I figured I was toast to some king he had no business limping with. However, a thought also entered my mind that these limpers seem to put up a fight when a blind bets out.