Kazu works at "Funiculi Funicula" cafe. There is a mysterious rumour that if a customer takes a specific seat at the cafe, that customer can travel back to a time of their choice.

In February, 2020, a luxury cruise ship carrying 3,700 people arrives in Yokohama Port. One passenger, who disembarked in Hong Kong, was confirmed to have the new coronavirus. The coronavirus has since spread rapidly on the cruise ship. More than 100 passengers complain of symptoms. The DMAT (Disaster Medical Assistance Team) is called to the port to respond. DMAT is specialized in responding to natural disasters like earthquakes and floods. They do not have experience or training in dealing with new virus outbreaks. Hideharu Yuki, who is a leader in DMAT, and government official Nobutaka Tatematsu command the cruise ship situation at the headquarters. Doctor Yukiyoshi Sendo and members of DMAT, including Haruto Sanada, decided to board the ship to deal with the situation.

In the year 2020, when Covid-19 is rapidly spreading around the world, chaos ensues and people's daily lives are completely upended. A virus outbreak suddenly occurs at the prime minister's office in Japan. This leads to the prime minister's sudden death. The Japanese government then puts in place an unprecedented plan, which is to bring back the greatest leaders from Japan's past through AI holograms and form a super cabinet with them. These famous individuals include Ieyasu Tokugawa, Ryoma Sakamoto, Nobunaga Oda, and Hideyoshi Toyotomi. People are stunned and at the same time go crazy over the endless execution of policies by this new legendary cabinet. Risa Nishimura wants to become an announcer and currently works as a TV reporter for a broadcasting station. She approaches a government spokesperson, Ryoma Sakamoto, for an exclusive scoop. Due to an unexpected case, she realizes that something is going on behind this cabinet.