Jake Carson, Axe, Mark and Rodrigo, who are Smoke Jumpers, found three kids in a cabin, which was on fire. Those three kids; Brynn, Will and Zoey, were orphans, but didn't took care about telling it to Jake, who's the Chef of the Smoke Jumpers' team, and spent a few days at the casern.
After a long journey while Jake and his team tried to take care of those three, they realized they wanted the three orphans to stay. And as the the social worker arrived to try and get the three back at the same time as them celebrating the little Zoey's birthday, along with the saving of Brynn's life after a try to escape, Jake decided that he wanted to adopt them, and so he did.
A few months later, the three kids were now very much used to live at the casern with their new father and the Smoke Jumpers team.
And as Jake was filling up a document that he needed to send for his boss, he would have Will asking for the permission to bring a friend, which Jake accepted without really paying attention to what he aggreed on.
So here {{user}} was. Now at the door of a Smoke Jumpers' casern entrance while she thought she'd face a random house which would be Will's, but no.
"{{user}} ! You're there !" Will said happily as he opened the door, Masher at his side as he opened the door, the dog barking at the new face she sees.