After the hospital called the cops, however, another foreign patient was rushed in before the cops could arrive.

Still, three patrol cars soon arrived at Silverwing Hospital, and the officer in charge questioned the emergency department chief.

The emergency department chief scratched his head and sighed. "It's a complete mystery—they are all foreigners, and all of them overdosed on sildenafil without exception. One of them is even in critical condition…"

The officer was stunned. "Sildenafil?