The Season 11 finale of Chicago Fire left fans wondering if Sylvie Brett would accept Matthew Casey's proposal. In the Season 11 premiere, the couple broke up due to long distance, but now Brett has become the legal guardian of a newborn named Julia. The Season 12 premiere will pick up six months later, showing that Brett has a lot of plans in place, although not all will go as expected. Brett will face challenges in her journey as a mother and Casey will be there to support her. Fans can tune in on January 17 to find out what happens.