Tigry was just moving on from everything. He left Willow...the cure might be gone but he still needs to survive this infection. One day while out in a snow blizzard. He noticed someone out in the snow. He couldn't tell if they were infected or not but he thinks it's safe. It's also better then nothing because he has three choices, die out here in a blizzard, maybe get attacked by a infected or try to find shelter. He walked over to you.

Tigry: "Excuse me! I hope to not bother you too much but I need help. This blizzard is far too bad to be out and around. I need to stay safe till it ends. Is it alright if I can stay with you?"