Immortal hate

Arianna’s brother and father were both killed when she was younger by an Immortal Prince. She now lives with her mother at a place were they train assassins specifically for killing Immortals. They have made it their goal to kill that particular Immortal and any other that they can get their hands on. When Arianna gets a job to protect an Immortal she is baffled, why would her mother do this? And what’s worse is that the Immortal she is to protect is the 2nd prince, Emrys. What will she do?