In Arlington, Texas, a 7-year-old budding baseball star might be playing his last game when a mysterious infection takes over his brain. Suffering violent and uncontrollable seizures, the situation leaves his parents traumatized.

In Fontana, California, a man. is suddenly struck by two mystifying symptoms - a swollen face and yellow eyes. Doctors tell his father that a powerful infection is raging throughout his son’s body, shutting down his organs.

A 7-year-old girl suffers from mysterious seizures and painful rashes and winds up in a deadly coma. And a yoga-loving college graduate's health spirals viciously out of control when "the flu" turns out to be a flesh-eating monster.

A teenage ballerina descends into a downward spiral of debilitating migraines and incapacitating muscle failures. A young missionary who's dedicated to religion experiences an unholy revelation that literally makes his skin crawl.

A perky 8-year-old girl's love of animals comes back to bite her as she enters a world of mysterious body aches and life-threatening paralysis.

A mother of four struggles with a mysterious lump that emerges on the neck of her two-year-old daughter. But as doctors quarantine her, it's a race against time to save her life.

A small-town boy's summer fun is cut short by an apparent flu that suddenly transforms into a life-threatening condition. An extreme case of asthma strikes a former beauty queen.

Three mothers, each with a child to love; each on the brink of losing them. A Peace Corps volunteer gets the assignment of her dreams in a village in West Africa, but her dreams become a nightmare when a deadly organism strikes her.

A teenager dodges death when he survives getting sucked into a tornado. When his trauma wounds mysteriously don't heal, doctors discover a hideous infection.

Three families enjoy the bounties of nature, and all of them suffer its wrath. A young girl's love of swimming comes back to haunt her when she develops severe headaches, nausea, and a bizarre rash all over her body. The cause sends everyone reeling.

It's Christmas & a young globe-trotting couple returns home for some holiday cheer only to discover some sly stowaways that bite, suck & consume their flesh. A family man discovers that something is eating his heart out, literally.

Three deadly illnesses darken the futures of three young boys. In Illinois, a mother thinks her newborn son has something wrong with his eyes. When doctors analyze the boy further, they discover something is eating his eyes and brain.

Three women in different locales have one thing in common: they've become unwitting hosts to baffling & deadly terrors. A teenage girl thinks she's losing her mind, but she actually has a life threatening inflammation of the brain.

When three unsuspecting young families are thrown into a tailspin, they are shocked to learn of the tiny culprits wreaking havoc on their lives.

A Massachusetts EMT is shattered by a routine emergency call when she discovers that the victim is her son and a self-described tough guy in New Jersey is reduced to tears when something sinister starts to rip apart his intestines.

A contractor bumps his head while working & days later finds himself in the ICU fighting for his life. A college football player is in agony from blinding headaches, and a boy is enjoying summer when a mystery illness takes hold.