The beat was heavy, filling the lungs with dull reverberation. Even far below, she could feel the echoes of it, the sounds causing the musty pools of green-tinted water to shiver with gentle rings. It was dark here, thick with decay so old that the mossy film covering the black tunnel walls had long ago fossilized, now a murky grey beneath the newer slick of green.
A thin crackle of noise scratched in her ear as someone tried to use the radio. With a hiss, she crept along the tunnel, her only light coming from the occasional ventilation shafts that emptied into an overcast night sky, dully reflecting the glow of the city. Not that she needed much light. Not anymore.
The scuff of boots just ahead made her pause, until the other's face became clear.
"I've told you, the radios don't work d
