James and Lily survived the night Voldemort attacked them but they disappeared that night without a trace.

Humphrey runs away because he can't see Kate and Garth getting married, when he was running away he met someone who conviced him to go back and fight for Kate

humphrey's parents where killed and said that Humphrey must train to become a delta and kill the wolf that killed his parents. he runs to the western pack in Jasper park and get's accepted and in secret he trains himself to become a delta.