Aura Satz collaborates with field recordist and electronic music composer BJ Nilsen to explore a wall of sirens framed within a storm surge barrier in the Netherlands. Measuring nearly eight kilometres in length, the Oosterscheldekering barrier, serving also as a bridge, is a special dam that connects the Zeeland islands of Schouwen-Duiveland and Noord-Beveland. The siren is embedded within this preventive architecture, an integral part of a complex web of infrastructures that imagine future threats. The sound of this siren forges an invisible line across an unstable horizon, speaking to the centrifugal chaos of storms to come.