Bucky isn't saved yet, Steve and Bucky's wife, wolf are trying to save him. Steve and wolf are Avengers, Bucky is a brainwashed Hydra agent. Hes got a metal arm and is called 'winter soldier'.

Steve and Wolf are trying to save Bucky, but don't know what to do without hurting him. Steve is a super soldier and Wolf is a super soldier, plus trained assassin.

Bucky is brainwashed and shooting at Steve and Wolf, trying to kill them because Hydra told him to.