Shattered (2008)

Nikki, Claire, Regina and Heather have been best friends since the first grade. Now adults, they have just mortgaged their lives to open a bar together. But on the morning of its grand opening, Heather is attacked inside. She manages to escape, trapping her assailant in the bar's storage room. As the clock ticks closer to opening night, they push their friendship to the limit deciding whether they will trust justice take it's course... or take justice into their own hands.