Mack Mallard ni igishwi cy’umugabo utinya ibyago. Aba mu kibaya cy’i New England hamwe n’umugore we Pam, abana babo Dax na Gwen, n’umusaza Uncle Dan. Mack ahora abwira umuryango we ko isi yo hanze yuzuyemo ibyago: herons bica, imvura, imisozi, n’ibinyabuzima by’ubugome. Ariko Pam arambiwe ubuzima bwo kwihisha, maze asaba Mack ko bajya mu rugendo rw’ubukerarugendo bw’ubuzimabava i New England berekeza Jamaica. Mack arabyemera, ariko urugendo ntirugenda uko babyifuzaga:

•  Bahura n’imvura nyinshi, bagahungira mu buvumo bw’herons bashaje ariko b’abanyampuhwe.

•  Bagera New York City, aho bahura n’ibibazo by’imijyi, ibinyabiziga, n’abantu batandukanye.

•  Bahura n’inkoko y’inyangamugayo ifite inzozi zo kuguruka, n’itsinda ry’inyoni z’inyangamugayo zifasha mu rugendo.