set one's sights on sth

set one's sights on (on doing something) (to decide what you want to get or achieve something) — нацелиться; загореться желанием; поставить себе цель; ~ приспичить

Example 1: Once she sets her sights on something, she won't stop until she gets it. — Если уж ей что приспичит, она не остановится, пока своего не получит.

Example 2: I hear she really has her sights set on becoming a journalist.