。
She got called over and went to the party.
Literal
She [topic-は] was-summoned-and party [to-に] went.
呼び出される is the passive of 呼び出す ('to call out, summon, page someone over'). The te-form chains the trigger (being called) to the resulting action (going) — a stock pattern in Japanese for stimulus-then-response, where what happens to the subject leads directly into what they do next. The caller is left implicit; only the effect on the subject matters. パーティーに行く takes に because the party is the destination/event one is going TO, a standard motion frame.