The summer of 1971 was hot and dry. This circumstance ensured that the plan would be exceeded and promised large earnings for Ivan Kopyriv's geological exploration expedition, which was located in the area of the Tunguska village of Erbogachen. Upon encountering a layer of permafrost, master Yelfimov, contrary to fire safety regulations, ordered the permafrost to be thawed with bonfires. However, the dry and gusty wind did its job: the resulting fire spread with catastrophic speed to the continuous forest areas, and the situation spiraled out of control.
| Actor | Role |
|---|---|
 Vladimir AntonikPavel Kopyryev | Pavel Kopyryev |
| GGalina MunzukLena | Lena |
 Viktor TarasovRuchyev | Ruchyev |
| NNikolai Olzej-OolAvachan | Avachan |
 Nikolay GravshinKrasnostanov | Krasnostanov |
 Vadim AndreyevYelfimov | Yelfimov |
 Yuri ZabarovskyKhayenko | Khayenko |
| AArkadi KatovshchikovNot listed | Not listed |
| VVasili NagovitsynNot listed | Not listed |
 Aleksandr GorbenkoGlokhlov | Glokhlov |
| VValentin VerkhoturovNot listed | Not listed |
 Vasiliy PopovGlyrin | Glyrin |
 Zinaida KulakovaNot listed | Not listed |
 Vladimir ShikhovNot listed | Not listed |
 Viktor SmirnovNot listed | Not listed |
 Vladimir SmirnovNot listed | Not listed |
| OO. UsanovaNot listed | Not listed |
 Inna VykhodtsevaNot listed | Not listed |
 Vitaliy YakovlevNot listed | Not listed |