Info:

Stiles goes away to prove he is not weak. He joins the millitairy but it's not what he tought he gets stuck in a 6 year contract.

6 years later he comes back Beacon Hills. However he comes back with PTSD, MDD (major depressive disorder), Anxiety, Insomnia and he is kind of Sucidal.

How will the Pack take it? How is Stiles going to act? And who is Leo? And why is Stiles not telling them much?