Australia is in the midst of a gayby-boom. It is said that twenty-four percent of gay and lesbian couples are now raising a child and their queer spawn are invisibly roaming Australian streets and schools. "Gayby Baby" follows the lives of four kids - Gus, Ebony, Matt and Graham - whose parents all happen to be gay. As they each wrestle with personal change, the outside world wrestles with the issue of marriage equality, and whether or not kids of same-sex families are at risk.