Allmen und das Geheimnis des Koi takes the elegant detective and his practical companion to Tenerife. A stolen fish becomes the centre of an investigation involving jealousy, intrigue and danger, with the sunny setting giving the familiar crime-film format a different atmosphere.
Heino Ferch maintains Allmen's charm and relaxed eccentricity. His exchanges with Samuel Finzi provide dependable humour through the contrast between luxury-loving detective and grounded Carlos. Their chemistry remains a key attraction.
Andrea Osvárt adds another worthwhile element as Jojo. Her more active involvement gives the relationships fresh possibilities, with strength and vulnerability making her more than someone waiting at the edge of the investigation.
The island landscapes and villas create a visual contrast with darker crime settings. Long, calm views allow the surroundings to register, while sharper moments of danger interrupt that apparent ease. The film looks inviting without forgetting its mystery.
Its suspense and emotional depth do not match the strongest instalments. The charm is more convincing than the sense of urgency, although the mixture of humour, elegance and drama still works well enough.
For existing fans, the cast and atmosphere should make this an enjoyable return. New viewers also receive a stylish introduction to Allmen's world. The film's distinctive location and ensemble give it value even when the investigation is less memorable than the company conducting it.