The devil's elixir

"Sean and Tess find themselves in a race: against the clock, against drug kingpins, and even against the DEA, to merge two divergent trails, one several hundred years old, the other as current as a heartbeat, which together may lead humanity to the brink of annihilation."@en
"What if there was an herb, previously lost to history in the jungles of Central America, capable of inducing an experience so momentous it could shake the foundations of Western civilization? What if powerful forces on both sides of the law got wind of that herb, and both launched a violent and uncompromising pursuit to be the first to exploit it? And what if FBI agent Sean Reilly and his girlfriend Tess Chaykin were, unknowingly, the only two people who could keep the lid on this Pandora's box capable of destabilizing the world?"
"What if there was an herb, previously lost to history in the jungles of Central America, capable of inducing an experience so momentous it could shake the foundations of Western civilization? What if powerful forces on both sides of the law got wind of that herb, and both launched a violent and uncompromising pursuit to be the first to exploit it? And what if FBI agent Sean Reilly and his girlfriend Tess Chaykin were, unknowingly, the only two people who could keep the lid on this Pandora's box capable of destabilizing the world?"@en