Alaina Gunley is an ex-military, ex-card collecting woman who happens to be Sam Wilson's best friend. Natasha Romanoff is the ex-villainous assassin, a high ranking member of The Avengers and Alaina's crush. When Alaina is forced into an Avenger's night-in by Sam, she realises that they are not as intimidating as she thought they would be. Especially when red catches her eye.

Starting her fifth-year at Hogwarts, Alex Shaw finds herself sharing a common room with the infamous Marauders. Her gift of connecting to creatures of any shape and size captures Sirius' attention, and subsequently sends her on a journey like no other. Unlikely friendships, blackmail and family drama ensues. Sirius x OC.