Line grew up in Aalborg, Denmark and featured for her hometown club AaB throughout her youth career, except from a short stint to B52/Aalborg FC.

As part of her studies at university, Line went to London for a semester where she played for Watford Ladies FC in the Women's Premier League.

Master studies then opened an internship opportunity in Melbourne and Line made the move down under and joined Box Hill United SC in the Victorian Women's Premier League.

With the ambition of making it into the Danish Euro squad, she made a move home to Vejle Boldklub and amateur football for the spring of 2017.

The gamble paid off in a spot as the third-choice goalkeeper with the Danish Euro team in July 2017[5] and later earned her the professional contract with Kopparbergs/Göteborg FC in Swedish Damallsvenskan from August 2017.