Blake and his friends return from Gateway City for a final showdown with Xander the Enigma, with only one chance to save Underworld City. and the world up top.

After the final, reality shaking killing in Underworld City, each world on the bank of the River Styx teeters on the brink of catastrophe. Out of options, Blake is forced to go further than he ever has before... down the river to lands beyond the Underworld.

The escape of Collin Morrow and a shocking death send the entire team up top into a tailspin, and force Blake and Conrad to face a deadly labyrinth in Underworld City as a last chance to save a soul and find a clue that can help them thwart their powerful adversary. Presented in Dolby Atmos for a premium listening experience.

With new suspect Collin Morrow suddenly behind bars, Blake and company finally feel like they have enough breathing room to track down the source of the deadly weapon in Underworld City... a mission that will force Blake to team up with the unlikeliest crew of allies he's ever assembled. Presented in Dolby Atmos for a premium listening experience.

With Montrose itching to arrest Blake, the team follows the thinnest lead, which takes Blake and Conrad to the dark and strange Underworld Zoo... Presented in Dolby Atmos for a premium listening experience.

With bodies starting to pile up on both sides of the river, Hattie takes Montrose on a visit to a powerful ally up top, while Blake seeks out an old enemy in Underworld City, hoping for answers... Presented in Dolby Atmos for a premium listening experience.

With Police Commissioner Madeline Montrose breathing down Blake's neck up top, Hattie follows a breadcrumb she hopes will point toward the real suspect. Meanwhile, the Boatman extends an invitation to discuss the mysterious death in Underworld City, which Blake accepts for his own vengeful purposes. Presented in Dolby Atmos for a premium listening experience.

Since saving the city from the Black Rose, Blake Wayman has drifted away from the spotlight and Underworld City, and back toward some bad habits, until two murder cases come calling with his name all over them. One up top... the other across the River Styx. Presented in Dolby Atmos for a premium listening experience.