Mother is dead and the Walker sisters have been left alone to deal with the abusive Sam, their "dear old dad." Desperate to keep their autistic little sister, Amber, safe from him, Jade the oldest and Crystal hatch a dark plan. But their execution of it puts them in the sights of a deeply twisted serial killer, who discovers what they've done at the same time that they uncover his own sick, pastime. The Walkers' near neighbour happens to be Detective Dennis Kortovich, who gets assigned the HEATERS; Chicago's toughest, most high profile cases. As the girls are inexorably pulled into the killer's lethal net, their only hope is that Detective Kortovich's detective work will somehow lead to their rescue...without revealing the dark secret they're hiding. Can the girls lead Kortovich on a cat and mouse chase without ending in a trap that will send them away for life?