At her high‑school graduation party, Emma, wearing a face‑hiding ring, takes a heartbeat test with her secret three‑year boyfriend Ethan.
Ethan publicly rejects their relationship and becomes Lily’s contract partner. Broken‑hearted, Emma goes overseas to study.
Years later, regretful Ethan begs for reconciliation, yet Emma, having removed her ring, has fully moved on and refuses him.
