Ululatum in tempore Tempus (Howling at Time)

Alice Longbottom, older sister of Mavis Longbottom and best friend of James Sirius Potter is sent hurtling back in time when a magical experiment goes wrong. She is torn out of 2020 and sent back forty-four years, where she is discovered by the Marauders the morning after a full moon. She is left to fight in the war that her father helped to end, whilst trying to find a way home.