Grappling Hook in 2.5d Game

I've been trying to create a 2.5d Platformer with a Grappling Hook. Right now, I haven't been able to get very far. I've searched Unity Answers, the forums, and google to no avail.

             var hit : RaycastHit;
             var ray = Camera.main.ScreenPointToRay (Input.mousePosition);
             if (Physics.Raycast(ray, hit, 15))
             {
                 grappleDirection = ray.direction;
                 grappleDirection.z =0.0;
                 hit.point.z = 0;
                 grappleTargetPoint = hit.point;
                 print(grappleTargetPoint);
                 print(hit.point);
                 Debug.DrawLine(transform.position,grappleTargetPoint,Color.red,5);
             }

Right now, my Raycast is probably more suited to a top down game rather than a platformer. It can basically "hit" inside of any object and that isn't what I want. Ideally, I would think, would be to send a Ray out in the direction of the mouse and have the hit.point from that be a target location.

Then, from there, Pull my character towards it. (Or pull light objects towards him). However, I'm using a character controller and I'm not sure how to go about doing that.