you, and the rest of the team were escaping up the ladder to get away from the muts as more started to appear.

finnick stayed behind, trying to kill them and keep them away enough for you guys to escape.

as more began to pile up finnick tried to climb the ladder but got bit in his arm which made his grasp weak.

as you watched finnick fall into the pile of muts, gale jumped down and sacrificed his life, bringing finnick up to safety before being dragged down to his death.