1.  Opened up the image in ACR and adjust exposure.

2.  Fixed the composition. I did this by double clicking on the background, pressing ctrl t (or edit-free transform), held down shift and drug the top left corner out a tiny bit so they weren’t quite so centered.

3.  Duplicated the Layer.

4.  Used the clone stamp set to 100% and stamped out the rest of the people (just basically creating more trees and more of a solid image).

5.  Next is the black and white conversion. Go to Image-Mode- Lab Mode.

6.  Next find your channels palette and click on your lightness channel.

7.  Then go to Image-Mode-Grayscale.

8.  You will have a pretty light version of a black and white at this point. Most likely you are going to want to add some depth into your blacks to give it more contrast. I decided for this image to do more of the matted look.

9.  Create a curves layer where the left side climbs up. Then adjust the midtones area per your taste.

10. My final step is adding the gradient layer to bring some color back into the black and white.

11. Click on gradient in your adjustments palette. It may look kind of wonky at first. Double click on your gradient and choose your colors. The colors on the left of the gradient will affect your darker colors in your image. The colors on the right side of your image will affect the lighter areas. I chose a purple and yellow.

12. I then pressed ok, and set the blend mode to soft light and changed the opacity at 65%.

And here is the before and after, side by side.