In the Peruvian jungle, a Chopec Sentinel named Incacha is enraged by the pollution of his land by a contaminated oil well and the murder of one of his tribesman by an employee of the Cyclops Oil Co. ... Back in Cascade, Ellison foils a burglary but accidentally shoots a security guard. Luckily, the guard is OK, but Ellison's dismay causes his Sentinel powers to disappear.

When basketball players on the Cascade Jaguars start turning up dead, Jim must calculate the difference between a good shot and a deadly one.

Blair falls for Jim's new neighbor; a beautiful woman named Iris, but learns that this particular girl next door isn't as innocent as she appears. Iris and her ex-boyfriend Chance haven't exactly been living the American dream and the smitten Sandburg is quickly sucked into this couple's twisted nightmare.

While Captain Banks, Blair, and Jim are fishing together they stumble across a poaching ring that's hooked up with a powerful Chinese gangster named Ho Ng.

Using his sentinel powers, Jim saves Edward, the grandson of Mafia don Dominick Lazar, from drowning. When Don Dominick himself thanks Jim for his efforts, he decides to use this opportunity to get on the inside of the city's organized crime world.

After a minor car accident and heated argument with the driver, Dan Freeman, Jim Ellison finds that this unbalanced man has targeted him for a full-blown vendetta.

During a local Amnesty International conference, Ellison and Sandburg are assigned to watch over Genevieve Benet, the outspoken St. Germainian peace activist.

Visiting his cousin Rucker on a remote island, Jim learns that people on deserted islands don't always pursue the "natural life." While rescuing a woman named Monique from a storm-tossed boat, a huge bag of heroin surfaces.

When a dead body falls out of the sky with every bone broken, every organ shattered, and no identification, Ellison and Sandburg know that they are not dealing with an ordinary criminal.

When archaeology student Martin Gillman is buried alive by a cave-in at an excavation site, Ellison and Sandburg suspect foul play. As they unearth vendettas between various members of the archaeological team allusions also surface to hidden treasure buried at the site.

Jim Ellison agrees to go undercover as an inmate in Starkville Prison to investigate a series of suspicious prisoner suicides. He must depend on his thick skin and diplomatic skills as well as his sentinel abilities to navigate through the treacherous world of gangs and dishonest guards within the prison walls.

When a local Santeria ceremony goes wrong, one man is dead and the only witness is a woman who was deep in a religious trance while she unknowingly watched the murder. Ellison and Sandburg need to enter into Cascade's Little Havana community in order to uncover the killer.

Jim Ellison can't explain how Warren Chapel, a permanent patient at a maximum-security mental institution, has detailed firsthand knowledge of a string of grisly murders occurring around Cascade.

When Captain Banks is injured in a shootout at the Cascade National Bank, Captain Sarah Finkelman steps in as his replacement and steps on some toes. She rubs Ellison and Sandburg the wrong way with her new policy changes and obsessive control.

It's guys' night out for Ellison and Sandburg as they watch Sandburg's old buddy, boxer "Sweet" Roy Williams fight a few rounds. Things turn decidedly sour when Sweet Roy winds up dead and all the leads point to his jealous little brother, Jamie.

Professor Robert McCain, the Rainier University expert in serial killers, turns up dead and Ellison is forced to re-open a case that dates back to his youth. As a 10-year-old Jim discovered the last known victim of the infamous Country Club Strangler and it's haunted him ever since.

Some visiting Buddhist monks start dying in Cascade's Chinatown district and Lila, Jim's old love from his days in Bali, seems to be involved. Jim's investigation is hampered by some overwhelming sensory overloads that all but incapacitate him.

Ellison, Blair, and Captain Banks are trapped in Clayton Falls when some overzealous military officers quarantine the small town. Apparently, an airborne virus wreaked havoc on the community and now everyone's been ordered to stay in protective custody.

When the federal mint is targeted for a major heist, Ellison and Sandburg are joined by Megan Conner, a visiting police officer from Australia, as they prepare to apprehend the robbers in the act.

Jim's friend Roger Corman, a U.S. Marshall, is killed in a car bombing before he can reveal the name of a corrupt marshall that he's uncovered. Ellison must ferret out the traitor but finds his hands tied when the U.S. Marshalls themselves take over the investigation.

When a car comes barreling into the Cascade Police Station in the middle of the night, the Sentinel team finds themselves abruptly thrown into a murder investigation. Initially, their only witnesses are shaken-up but, when an alligator gets loose in the station, everyone goes crazy.

With Ellison having strange visions of jaguars and a series of superhumanly performed thefts occurring around the city, Blair and Jim suspect that he may not be the only sentinel in town.