You've left for a short study abroad program. The members of the Nijigasaki High School Idol Club feel there's something missing without you around. That's when Ayumu gets a phone call…

The members of Nijigasaki have decided to do a joint training camp with μ's. They get a call from Nico about meeting to discuss what they need to prepare.

μ's and Nijigasaki use Maki's parents' connections to borrow a house on a remote island for their joint training camp. And now, the day of departure has arrived.

The μ's and Nijigasaki girls arrive at their remote training camp venue. They drop off their belongings, then run off to enjoy the island to the fullest.

The μ's and Nijigasaki girls are having the time of their lives playing beach volleyball, swimming in the ocean, and enjoying everything the island has to offer. But, what's for dinner?

After stuffing themselves at their sunset barbecue, the μ's and Nijigasaki girls head back to the house. They can't wait for tomorrow's practice, so they're going to go straight to bed…or are they?

Listening to Nico's ghost story excited some while terrifying others, but no matter what, all of the μ's and Nijigasaki girls are having a blast. Shouldn't they get to sleep soon, though?

While talking about their plans for tomorrow on the way back to their rooms, the girls hear a piercing scream. They rush to see what it could be, but they were not prepared for what they saw!

Honoka's body was found in the vacation home on a remote island! Nico and friends jump right into finding the killer, but…

The “Murder on a Deserted Island” prank is getting out of hand, and some are tired of the performance. As they try to wrap it up, however, the true horror begins.