One spring, Yogi Bear and Boo Boo Bear awake from hibernation to discover three orphaned bear cubs left at the front door of their cave. Despite their initial reservations, Yogi and Boo Boo take the bear cubs into their home and take care of them. Meanwhile, Jellystone Park has gone over budget and the park commissioner orders Ranger Smith to close it down. This means that Yogi, along with the other bears at the park, must be sent to a zoo. Because Yogi can't stand the thought of being cooped up in a zoo for the rest of his life, he hatches an elaborate escape plan. Salvaging car parts from a failed fishing expedition, he constructs a getaway "Supercar," complete with a picnic basket rumble seat for the three orphaned cubs. Together they make their escape from the park to find a new home.

1945年6月28日，某大学毕业舞会，男青年罗伊（Timothy Wahrer 饰）和他的女友弗兰西丝•罗斯玛丽•凯瑟姆（Joy Glaccum 饰）被人残忍杀害，凶手始终下落不明。弗兰西丝身为校领导的父亲（Lawrence Tierney 饰）伤心过度，从此禁止举行任何形式的庆祝舞会。
时间转瞬即逝，转眼来到1980年。35年前的惨案除了当事人外早已为其他人淡忘，以帕姆（Vicky Dawson 饰）为首的一群年轻人难耐寂寞，他们决定将挺办数十年的毕业舞会带回校园。经过一番努力，年轻人们最终如愿以偿，而当他们陶醉在轻歌曼舞中之时，似乎当年那个神秘的杀手也回到了青年们的中间……