Assigned as detectives in a darker, alternate reality of Seaddle, Octavia and Vinyl Scratch delve into the shady community that squirms beneath the city streets. With a mysterious murder of unknown cause as their only clue, Octy and Scratch must find out who killed this poor business pony, and why, before the one scheming behind the scenes decides to enact whatever foul plan he has concocted for the city.