Abby Kowalski has a big decision to make.

On Lifetime's new series, Against the Wall, single Chicago police officer Kowalski (played by Rachael Carpani) struggles to balance her work and family life in the new hourlong drama.

As the above sneak preview shows, Kowalski worries about telling her three brothers -- all members of a large family of cops -- about her new detective job with the Internal Affairs division.

"You got brothers on the force, you ever think about them?" Everwood vet Treat Williams, as Kowalksi's police officer father, snaps in the promo. "There's a code that every cop lives by. We protect our own!"

Check out the emotional sneak peek scene from Against the Wall above and tune into the season premiere July 31 at 10 p.m. (EST) on Lifetime.

By Allison Corneau for Us Weekly. For more Channel Surfing, click here.