Ammolite

Some people have their calling in life handed to them. Others have to find it for themselves.
For Tifa, it's both at once.
Holding onto a magical stone that could start the largest war she's ever seen, she's on a mission to deliver her sister's tomb marker to the aspen tree where Lula can ascend into heaven.
It would be easier if Tifa knew where the tree was. Simple if she didn't have groups of spies hunting her down to get back what she is carrying. Easier still if the ammolite at her back didn't grant either life or death, hurtling the latter continuously after her.
The one thing she has going for her is Riker who knows the way.
As much as she wants to trust him, it's hard to do when she discovers that his secrets are louder than her own. Fully assuming to reach the tree and die right after, Tifa explores what life offers that makes her want to stay, even if some kinds of power should never be touched, and some loyalties can never be changed.