In order for Andy to become normal again, he must eat the heart of the werewolf that bit him and in order for Brad's ghost to be at rest, the werewolf that ate his heart must be killed, too.
He must eat the heart of the werewolf and in order for Brad's ghost to be at rest. This is in order for Andy. This is to become normal again. This werewolf bit him. Rest is the werewolf. This werewolf ate. His heart must be killed. This was too.