"Fallen Devil Splicers are at war with the Hive in the Plaguelands. Find out why and put an end to it." —Shiro-4
― In-game description
Kovik's Sin is a quest.
|"Complete the "Bad Blood" Mission in the Plaguelands on Earth."
|The Wretched Eye|
|"Complete "The Wretched Eye" Strike in the Plaguelands on Earth."
|Return to Shiro-4|
|"Speak to Shiro-4 in the Iron Temple."