Four siblings; Natalia Romanova, Yelena Belova, James Barnes and Steven Rogers. All separated and gone from each other's eyes. Until one day, when one of them meets someone from their past, and will soon be brought together to take down a foe, threatening all of them. But will it be so easy to bring them back together? How will they finally handle being on the right side of the law? And what about the past that brings them all together?