London, present day. A pilot program meant to "modernize" the grid hides a predatory play: scheduled power dips that just happen to knock out small shops while luxury towers glide above the dark.When a young sound engineer, Daniel Mercer, drowns on a night laced with a peculiar six-beat cadence, Detective Eve Kavanagh hears what everyone else misses-a pattern: six soft ticks under the city's ordinary hum.Following that thread pulls Eve into an urban conspiracy where software signatures are as lethal as guns, and minutes from a boardroom can dim an entire street. With Malik-a skeptical data analyst-Leila, a battle-ready grid engineer, and a coalition of locals led by Asha, a launderette owner who refuses to fold, Eve unpicks a scheme braided by a property fund, a vendor's legacy firmware, and a chair who believes philanthropy is a synonym for permission. The conspirators call it resilience. The city calls it theft.As the investigation turns public, London begins to teach itself a new habit: listen first, log publicly, ask who gets dimmed before anyone touches a switch. The case moves from estates to courtrooms, from substations to council halls, until signatures become verdicts and "exceptions" are replaced by three plain words: explain or don't.Arthur Blackwood's urban thriller is fast, lucid, and deeply human-alive with backroom deals, technical intrigue, and the everyday heroism of people who keep the lights honest. With a memorable sonic motif-the six-tick cadence-and a cast of strong, grounded characters, this novel delivers momentum without losing its moral clarity.Come for the conspiracy; stay for the community that dismantles it. Once you hear the six ticks, you can't unhear them-and you won't read your city the same way again.