Three months after four-year-old Holly Gebhardt was kidnapped, she was inexplicably returned to the same park from which she’d vanished...with no memory of the ordeal. Though a local handyman was convicted, suspicion also fell on his friend - Holly’s mother, Cecily. The troubling doubts about her involvement shattered the family, forever driving a wedge between mother and daughter. Twenty years later, another girl goes missing under eerily similar circumstances. It’s just the latest in a series of kidnappings that Detective Jason Guidry thinks Holly can help solve.

Thirteen years ago, Jori Trahan’s boyfriend vanished without a trace. Now, after moving back home to Alabama to care for her ailing grandmother and autistic brother, she comes face-to-face with the deadly mystery behind his disappearance. Jori has a rare form of synesthesia, meaning she can “hear” colors; to her, tones of voice are as unique as fingerprints. With the help of this ability and a sympathetic cop, Jori comes dangerously close to uncovering the truth. But those responsible will go to any length - including murder - to keep their dark secrets buried.

FBI special agent Mercy Kilpatrick has been waiting her whole life for disaster to strike. A prepper since childhood, Mercy grew up living off the land — and off the grid — in rural Eagle’s Nest, Oregon. Until a shocking tragedy tore her family apart and forced her to leave home. Now a predator known as the cave man is targeting the survivalists in her hometown, murdering them in their homes, stealing huge numbers of weapons, and creating federal suspicion of a possible domestic terrorism event.

Detective Angie Pallorino hasn't forgotten the violent rapist who left a distinctive calling card—crosses etched into the flesh of his victim's foreheads. When a comatose Jane Doe is found in a local cemetery, sexually assaulted, mutilated, and nearly drowned, Angie is struck by the eerie similarities to her earlier unsolved rapes. Could he be back?

When an eleven-year-old is abducted on her way to school, the FBI doesn’t waste a moment, sending agents to scour the area and embedding Special Agent Ava McLane with the distraught family. In the eye of the storm is local detective Mason Callahan, whose life is crumbling to pieces - he’s related to the victim, and his longtime confidential informant has just been murdered.

Lieutenant Abby Mullen is no stranger to crisis. As the hostage negotiation instructor for the NYPD, she deals with worst-case scenarios every day. Nothing fazes her anymore. That all changes when she gets a call from Eden Fletcher, a fellow survivor of the infamous Wilcox cult. The two haven’t spoken since the night of a tragic, fiery massacre, when their paths diverged. But now Eden needs Abby’s help: someone has kidnapped her son and is demanding a $5 million ransom. As Abby throws herself into the case, she can’t help but wonder why the kidnapper has targeted Eden.

Three Chicago women have been found strangled, embalmed, and posed as if still alive. Doubting the findings of the local PD’s profiler, the FBI calls on forensic psychologist Zoe Bentley to investigate. Zoe quickly gets off on the wrong foot with her new partner, Special Agent Tatum Gray. Zoe’s a hunter, intense and focused; Tatum’s a smug maverick with little respect for the rules.

Coming from scandalous Florida treasure hunters and drug smugglers, Sloan McPherson is forging her own path, for herself and for her daughter, out from under her family’s shadow. An auxiliary officer for Lauderdale Shores PD, she’s the go-to diver for evidence recovery. Then Sloan finds a fresh kill floating in a canal - a woman whose murky history collides with Sloan’s. Their troubling ties are making Sloan less a potential witness than a suspect. And her colleagues aren’t the only ones following every move she makes. So is the killer.

Tracy Crosswhite has spent 20 years questioning the facts surrounding her sister Sarah’s disappearance and the murder trial that followed. She doesn’t believe that Edmund House - a convicted rapist and the man condemned for Sarah’s murder - is the guilty party. Motivated by the opportunity to obtain real justice, Tracy became a homicide detective with the Seattle PD and dedicated her life to tracking down killers.

Meg and Hawk are part of the FBI's elite K-9 unit. Hawk can sniff out bodies anywhere - living or dead - whether it's tracking a criminal or finding a missing person. When a bomb rips apart a government building on the National Mall in Washington, D.C., it takes all of the team's extensive search-and-rescue training to locate and save the workers and visitors buried beneath the rubble.

As a forensic reconstructionist, Rory Moore sheds light on cold-case homicides by piecing together crime-scene details others fail to see. Cleaning out her late father's law office a week after his burial, she receives a call that plunges her into a decades-old case come to life once more.

When a man is shot in the head, Bree Taggert and her new partner, veteran detective Dana Romano, respond to the call. They break the news to the victim’s ex-wife and learn the estranged couple’s five-year-old daughter was supposed to have been with him. What starts as a murder investigation quickly morphs into a desperate search for a missing child. The case stirs memories of Bree’s own traumatizing childhood. To find the little girl, Bree will have to relive her own terrifying past.

Convicted serial killer Benjamin Fisher has finally offered to lead San Bernardino detective Daniel Ellis to the isolated graves of his victims. One catch: he'll only do it if FBI profiler Reni Fisher, his estranged daughter, accompanies them. As hard as it is to exhume her traumatic childhood, Reni can’t say no. She still feels complicit in her father’s crimes.

College student Joe Talbert has the modest goal of completing a writing assignment for an English class. His task is to interview a stranger and write a brief biography of the person. With deadlines looming, Joe heads to a nearby nursing home to find a willing subject. There he meets Carl Iverson, and soon nothing in Joe's life is ever the same. Carl is a dying Vietnam veteran-and a convicted murderer. With only a few months to live, he has been medically paroled to a nursing home after spending thirty years in prison for the crimes of rape and murder.

After the devastating loss of her husband in Iraq, Morgan Dane returns to Scarlet Falls, seeking the comfort of her hometown. Now, surrounded by family, she’s finally found peace and a promising career opportunity - until her babysitter is killed and her neighbor asks her to defend his son, Nick, who stands accused of the murder.