This is an au from a series called the rookie based on lucy chen being exposed as she is a criminal who is her crew and who will join her and take her down?

When Lucy falls in love with a little girl named Fiona that she meets on a call, she wants to foster her, but it would be difficult to get approved as a foster parent as a single woman, so she asks Tim to marry her on paper despite the tension between them after sharing a kiss "for work". Tim agrees for Fiona's sake, but their marriage of convenience quickly gives way to more. Canon divergent after 4x22

In an alternate universe, Lucy and Tim are actors who have been cast opposite each other to film a movie together. To drum up buzz for the film in the hopes of making it a series, the studio asks them to fake date while the movie is filming. They agree to spend one year "dating", but it might not always feel like pretend.