In 2017, Mróz's fourth studio album "Zew" was released. The album was promoted by four singles: "Sierść", "Duch", "Nieśmiertelni" and "Szerokie water". The publishing house was nominated for the Fryderyk 2018 in the Album of the Year – Alternative category.

With the album, "Zew" Mrózu proved that he is an extraordinary artist and pleasantly surprised the enthusiasts of the classic "dirty" sound, characteristic of the 1970s and 1990s. The album "Zew" contains personal lyrics and conceptual songs that describe the wild, sometimes dark side of human nature. Mróz remains faithful to the principle that music is absolutely the most important thing.

After numerous fan requests and continued great interest, the album was reissued on standard vinyl, on a black 180-gram disc.

Tracklist:

Side A:
1. Ghost
2. Hair
3. Fog
4. Flight
5. Revolutions
6. Plan B

Side B:
1. Asteroid
2. Immortals
3. Houston
4. Like you
5. Wide waters