To get any winning from the scatter symbols the symbols needs to be in order 1 after other, from left to right and from right to left, so if they appear anywhere on the reels you wont get any winnings. Playing this game when the Big Chief lands, and he lands only on those two reels, on the first and at the 5th reel then you trigger the bonus round. eEen if he lands on one of those two reels then he substitutes all the symbols on the reels except from the scatter one,so again you will get winning combination.
The bonus round give you the opportunity to selected 3 times and matching 3 same symbols you got some winning combination, hitting 3 same symbols like the Big Chief the winnings are X 1000 multiplier, but honestly when I play this slot I always hit the Butterfly or the Flower, which they are with the lowest multiplier. I have played this game many times, specially at WMS Casinos, which they are having slots like this and I can assure you playing this slot the balance can really go high in no time, but only if triggering the bonus round.
I do recommend this game so I will rate it with 9/10.