Possible strategy from the Chiefs game?

[*PhilHos*]

So, I heard it floated this morning that the plan by the Bengals was always to drop 8 into coverage and play man defense but not until AFTER halftime so as to avoid Reid making any halftime adjustments to it. Meaning they had to weather the first half but they believed this defense would shut the Chiefs offense down.

What do you guys think? Did the Bengals coaches really have a plan in place they just knew was going to work but waited until after halftime to pull it off? Or did they have their plan and it didn't work and then they made halftime adjustments which did work? Or some other option?