It's been a hot minute since Disney Channel alum Bridgit Mendler released new tunes, but the wait is finally over. "Atlantis" — a mellow ode to a past lover and the first single off her upcoming Nemesis EP — dropped Thursday, August 25.

The song is a radical departure from Mendler's previous record, which was released during her Disney days. Hello My Name Is... was all bubblegum sugar, perfect for her young Good Luck Charlie and Wizards of Waverly Place fans.

"Atlantis" is the polar opposite. The track, which features rapper Kaiydo, has a distinctly electronic sound. "Atlantis" is cool, refreshing, and totally different.

"I wrote 'Atlantis' frankly about feeling numb after heartbreak because that's what I was feeling that day we wrote it," Mendler explained on Twitter. "Atlantis is a beautiful city that disappeared and was forgotten underwater. That is what it feels like to me to lose a first love. In the story, a remnant of that love is still haunting me even though it is 'asleep with the fishes.'"

Take a deep breath and dive into "Atlantis," below.