When a storm disrupts a game of hide and seek, Justin Casey and his friends Angela and Corky Roberts take refuge inside a house owned by Professor Humphrey Bumble, an inventor, and his Solar Ion Robot (SIR). The Professor shows them his greatest invention: a time machine built into his home. He plans to use the ongoing storm's electricity to get it working, but the energy sends SIR haywire and its antics damage the machine and make it send the whole house to the past, to the time of the New Testament. Now, as Professor Bumble makes several adjustments to fix his flying house, causing it to shift between various biblical events, Justin and his friends witness and participate in these events.