"TOKYO MER" is officially recognized for half a year. In order to carry out MER in the cities designated by the national decree, replacing the second doctor of Yinyu (he Laixian) who left the team, Xiduo (Suzuki Lianghei) had a headache. The voice of hoping for Binai's promotion in the team was also raised, but Yinyu asserted that Binai should move forward in circulatory surgery. Binai also felt pressure and worried about whether he could replace the sound feather. At this time, Aodo (Junshi Ito) came to MER as a supporting doctor. Qinghu, like Yinyu, is a medical technical officer of the Ministry of Health and Labor, ostensibly dispatched as an alternate second doctor, but there are ideas from the Ministry of Health and Labor. Just then, there was a collision between a large water bus and a house-shaped boat in Sumida. Carrying a lot of wounded, the out-of-control roof-shaped ship stormed away. Although they were members of the MER who rushed to the scene, they could not enter because they could not be docked. And due to the fuel leak inside the bottom, the possibility of explosion carrying a lot of patients was found! Xiduo and others carried out unexpected battles to save the abandoned people. That's the final challenge.