妻に秘密の車内~亡き母と過ごす日々~

Ben and Yumi are a long-haul trucking couple. They live and work out of their truck. But Yumi finds Ben acting strange. He won't let her near the back, making her suspicious. She checks but finds nothing, and Ben still sneaks to the trunk even at home, wearing out her patience. So what's in that trunk? Will their marriage still survive?