Rats

The name of this movie is Rats released in 2003-01-15 and it's main theme is The Brookedale Psychiatric Hospital is a crumbling institution which barely has enough money to remain open. Formerly a prison, it sits atop a warren of tunnels and sewage system viaducts. But Brookdale has a secret - a secret known by only one person. There's something living in the tunnels - something that's developed a taste for human blood....