BB gets the ultimate test of sisterhood when her rebellious brother Bucky comes to stay with her. Unfortuately, BB treats him like, well, a kid brother. Feeling slighted, Bucky becomes an easy target for Mantyz. Pretending to really want to be his friends, Mantyz manipulate Bucky into stealing the power chip from BB's microphone, putting Freefonix and himself in grave danger from the now super charged Mantyz.