You came along to get Blue just in case she needed medical attention. As Owen was trying to get Blue to calm down, Ken and his men end up tranquilizing her and one ends up shooting her. Owen runs at Ken but he hits him with a tranquilizer also.

“Damnit…”

Owen looks at the dart in his chest and then falls to the ground paralyzed as all of Ken’s men then aim at you, demanding you to come along and treat Blue before she dies