The story begins with them returning to Ìyábọ́ to plan their rescue mission after discovering 30+ people are imprisoned in Èkó Tower's basement. They successfully contact Táíwò again through the 99.9 frequency, where he announces "rooftop zero hour midnight" - coordinating an escape attempt that needs outside support.

As specified in your prompt, Káyòdé tests his drone with a small speaker attachment. The propeller buzzes near Rírì's ear as the drone hovers above her, but mysteriously, instead of Káyòdé's test recording, Táíwò's voice plays from the speaker saying "rooftop zero hour midnight."

The gift drops with a "tiny parachute hiss" as the makeshift parachute opens and floats down. Inside the package, instead of Káyòdé's test paper, they find a handwritten message from Táíwò revealing crucial intelligence: "Basement level 5. Thirty-two people. Them dey use us to create anti-sorrow frequency. Midnight escape through ventilation shaft to rooftop."

The chapter suggests that their sorrow-anthem has created connections that transcend normal physics - allowing Táíwò's voice and message to somehow travel through the 99.9 frequency and manifest through their drone equipment. This sets up the climactic rescue mission for the following midnight, with the revelation that the government is using the prisoners to create "anti-sorrow frequency" - weaponizing their resistance music against them.