Sunheart wasn't born in ThunderClan. He was born a loner named Sun. He met Silverfoot when she was exiled from the clan for being falsely accused of disloyalty. Sun was immediatly taken by Silverfoot's beauty and skill, it didn't take long for them to become very good friends. One day, ThunderClan's medicine cat Cherrycloud, found Silverfoot when she was expecting his kits and insisted she and Sun come back to the clan so that the kits could be raised properly. Darkstar reluctantly accepted.